Convenia for Cats: Sacrificing Safety for Convenience?

cat injection vaccination veterinarian

Most cat owners know that medicating a cat can be challenging. That’s probably why many veterinarians as well as cat owners celebrated when Convenia, a long-acting, injectable antibiotic, came on the market in 2008. Convenia is manufactured by Zoetis, formerly Pfizer Animal Health.

The idea of a one-time injection, instead of giving regular anitibiotics in pill or liquid form once or twice a day for two weeks or more, seemed like a great solution to the problem.

However, contrary to regular antibiotics, which are rapidly cleared from the body, Convenia stays in the body for two months or longer following injection, even though the antibacterial effects only last for two weeks. All drugs have some side effects. While some cats may do just fine with Convenia, others may have side effects ranging from mild to life threatening. And with a long acting drug like Convenia, there is no way to simply stop giving the medication – it’s already in your cat’s system.

Amber was one of those hard-to-pill cats. After careful discussion with my vet, I agreed to use Convenia following a dental procedure, which I’ve now come to learn is an inappropriate use for this drug. At the time, I only had misgivings about it because of its long-acting properties. Thankfully, she had no side effects other than some mild diarrhea, which is a common side effect of most antibiotics.

I recently came across a comprehensive article about Convenia by Dr. Lisa Pierson, the founder of catinfo.org, one of the best and most comprehensive websites about feline nutrition. In her article, Dr. Pierson weighs the pros and cons about administering this drug to cats:

Convenia: Worth the Risk?

Dr. Pierson’s article is a must read for all cat owners.

Editors’s note: comments about your  experience with Convenia are welcomed and encouraged. Comments that are disrespectful of others or malign the veterinary profession or individual veterinarians will be deleted. Please read our comment guidelines for more information.

References to other resources and/or websites or Facebook pages about Convenia which may be provided in the comments section are not endorsed by the site owners.

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643 Comments on Convenia for Cats: Sacrificing Safety for Convenience?

  1. Jacqui
    April 9, 2016 at 2:24 pm (2 months ago)

    My cat went to the vet Monday afternoon 4/4/15 because she was throwing up. The vet did an x-ray and it turns out my cat was constipated. My vet said she wanted to give her a mild sedative and pain med because she suspected the stool would be hard and the procedure might be painful. I didn’t like the idea, but agreed. The enemas went well and the stool was soft.

    *When the vet called me to say I could pick her up she told me she gave her a CONVENIA shot because she was afraid that my kitty might have aspirated some of the vomit into her lungs and she didn’t want her to develop pneumonia. For the first 2 days she was super drugged up, or I thought, but now as the days have gone by and she hasn’t gotten much better, I think it’s the Convenia. Before she started vomiting Monday she was doing great. Her kidney disease hasn’t progressed for years. She was happy, eating, playing.

    Now she is just lying on her heated pad by my bed surrounded by blankets. That’s all she wants to do is sleep and lie there. I’m losing my mind. I have been warming her food and feeding it to her off my finger, this is seemingly the only way she will eat right now. We’ve also been giving her subQ fluids everyday. She is “improving” a tiny bit every day. The first 2 days it was like her back legs weren’t working right. Since Monday the furthest she’s walked is about 20 feet. I’m kind of unfamiliar with this since she hasn’t been sedated since she was a kitten to be fixed, and only been on antibiotic once for a week. These are all the meds they gave her on Monday Ketamine, Zofran, Dexdomitor, Torbugesic 1 ml injection, Convenia .28 mls.

    I am TERRIFIED that I’m not doing enough! Does anyone know how long these lethargic/ personality changes are supposed to last? Please advise me of anything else I could be doing and if anyone has any convenia stories with a happy ending, please share.

    Reply
    • Ingrid
      April 10, 2016 at 5:42 am (2 months ago)

      You need to contact your vet, or an emergency vet, immediately, Jacqui. Your kitty may need aggressive supportive care.

      Reply
      • Jacqui
        April 10, 2016 at 1:54 pm (2 months ago)

        Thanks for your reply Ingrid. My kitty seems to be doing better today. She is actually walking around and jumping up on her favorite spots etc. Her personality has come back quite a bit. 🙂 I have an appointment tomorrow morning with my vet, but I’m guessing she’s going to be stumped, as she was when I called several times last week. 🙁 So frustrating. But my kitty is eating now, not as much as usual and I will keep giving her subQ fluids and warming her food etc. I’m just hoping this convenia reaction will subside soon.

        Reply
        • Niki Moore
          April 10, 2016 at 2:31 pm (2 months ago)

          I would get some probiotics into her asap, they won’t do any harm but can definitely help support her while this drug is still in her system. I dosed my cat for the entire 60 days it lasts . Good luck.

          Reply
        • Ingrid
          April 10, 2016 at 5:01 pm (2 months ago)

          I’m so glad she’s doing better. Keep us posted!

          Reply
    • Mary Ann Farley
      April 10, 2016 at 4:50 pm (2 months ago)

      Jacqui,

      My cat Olive was given four meds Oct. 23…Convenia, Depomedrol and two vaccines. The first week was hell as she could barely walk or eat. She ultimately needed an enema. I took her to a number of different vets for second, third, fourth opinions. She began to get her strength back after three weeks, but she was clearly traumatized as this once bundle of love was now under the bed all the time.

      I ultimately hired the best cat behaviorist I could find… Mieshelle Nagelschneider of the Cat Behavior Clinic in California. We consulted on the phone as I’m in NJ.

      I also took Olive to a holistic vet who recommended Prozyme Plus, Feline Omega Benefits by VRN, plus two acidophilus meds… FortiFlora, which she loves, and Rx Biotic, which I sprinkle on her dry food. I have her on Pride brand wet food and Orijen Regional Red, which is the best dry food on the market as it’s 80 percent protein.

      Your cat will need acidolphilus/probiotics for at least six months no matter what brand you choose.

      Slowly, my loving kitty began to improve and we are now doing play therapy. I’ve bought a few books on clicker training and she just loves it.

      I don’t know that I’ll get 100 percent of my baby back, but she’s SO much better than she was. Some cat parents say it took a year for their cat to completely recover.

      If you have limited funds, focus on large doses of acidophilus and subQ fluids. Ask your vet to show you how to do it at home.

      I totally understand where you are emotionally right now, so write to me any time for support. I am here for you.

      Mary Ann
      Sorry for typos! I’m on my phone here.

      Reply
      • Ingrid
        April 10, 2016 at 5:03 pm (2 months ago)

        Thank you for sharing your experience, Mary Ann. I’m glad your kitty is recovering.

        Reply
      • Jacqui
        April 11, 2016 at 4:04 pm (2 months ago)

        Thanks for your tips and support. My cat seems more like herself the past few days, but the anorexia is a problem. She is still eating every day, but I have to warm her food and feed her by finger sometimes and it’s still not as much as she usually eats. I’ve even started giving her fishy fancy feast which she never gets to entice her. Does anyone know if starting a probiotic would help with the anorexia quickly? I read about appetite stimulants, but I’m scared they would make her more sleepy. Thanks. 🙂

        Reply
        • Sarah
          April 11, 2016 at 9:28 pm (2 months ago)

          Jacqui, When my cat had a severe reaction to Convenia, I gave her the most appetising meals I could devise along with some natural unflavoured yogurt with acidophilus….cut up roast chicken, and the fresh lamb, chicken and sardines that she was used to eating. If you haven’t already been feeding her fresh food, it may not be the time to try it but cooked chicken, meat or fish should be appetising and the yogurt helps restore the intestinal flora. I’m not a vet but my instinct is that if the digestive system flora have been compromised, it’s probably best to minimise processed food as far as possible. My cat, even when she was terribly ill, ate all the food I gave her until a day before she had to be euthanased (she ended up in a severely toxic state because of inappropriate vet treatment for the Convenia reaction). From everything I have read since then, the probiotics are vital but until you get them, you could try some natural yogurt and some cooked chicken, meat or fish. Just a suggestion; hope it helps and that your cat pulls through. They are so precious to us.

          Reply
        • Mary Ann
          April 11, 2016 at 11:47 pm (2 months ago)

          Appetite stimulants had no effect other than to make my cat hungrier and more affectionate. My cat went into a period of inappetance as well after Convenia but with the help of the stims, it passed. Sounds like your cat just has to get over the humps many of us have gone through.

          Reply
  2. Fay Macalester
    February 27, 2016 at 11:02 am (3 months ago)

    My cat was given a Convenia shot on 12/22/15 by an emergency vet who thought “Socks” had a severe urinary infection, even though he had not run a urine test to my knowledge. I had carried Socks there because he had been obsessively licking his genital area for over a week and I knew that he had never done that in his 16 years. At any rate, not long after the Convenia shot, a small knot came up around the injection site…that small knot over the past two months has now grown into the size of a walnut and is hard as a rock…it is alarming to me how rapidly it has grown and how hard it is. Only reason I’ve not taken “Socks” back is because he was diagnosed 11/15/15 (prior to this Convenia episode) with SCC in his mouth at the back of his tongue and I was told at that time in November he probably would not live until New Year’s. Well, it’s now 2/27/16 and he is still here. He readily accepted my having to syringe feed him three to four times a day, and he has co=operated with my giving him subQ fluids every other day to help with his water intake…
    some days he is more active than others playing with his catnip fishing pole or liking us to play with his laser light..he even comes to me to pat me on my face when he’s hungry if I’ve not fed him yet…
    My original vet out of state where we used to live, told me over the phone I’d know when it was time to let “Socks” go because he would be lethargic daily and more obviously, she said when I went to syringe feed him and he balked and/or simply could no longer swallow, that then I’d know it was time…
    My point being: My husband has said since Socks is already terminally ill, he sees no logic in our going to more expense to take him back to have this walnut sized hard growth examined or biopsied because “socks” is going to die anyway from the SCC…
    But, the weirdness of this knot coming up and growing so rapidly around the convenia injection site just has bugging me for several weeks now. There’s just no other obvious explanation for it…
    So, I just want an opinion other than my husband’s as to whether it is advisable to incur the additional expenses and take “Socks” back to the speciality vet for more tests or bloodwork to determine what this large hard knot growth is and how it is or could be affecting what’s left of his life. Would appreciate any advice. Thanks so much.

    Reply
    • Ingrid
      February 27, 2016 at 11:27 am (3 months ago)

      You’re dealing with a lot of concurrent issues, Fay, and anything I’m about to say is strictly speculation based on what you’re telling me. The knot around the injection site sounds like it is most likely a fibrosarcoma. Here’s more information about these tumors: http://consciouscat.net/2013/04/01/injection-site-sarcomas-in-cats/ They can be caused by any kind of injection, including vaccines, antibiotics like Convenia, steroid injections, etc.

      Squamous cell carcinoma typically has a very poor survival rate, and it’s quite remarkable that Socks is doing so well with it.

      Treating the injection site sarcoma (if that’s what it is) would involve surgery. It’s a tough decision whether you would want to put Socks through that, given his SCC diagnosis.

      I wish I had a simple answer for you, but I hope this helps at least a little. All my best to you and Socks.

      Reply
  3. Christy
    February 4, 2016 at 5:47 am (4 months ago)

    I’m scared that my 18 year old cat is going to die from being injected with Convenia. He’s not been himself since, not eating and when he does drink water he throws it up. He has kidney disease and I’m afraid with no water and throwing up his kidneys will really shut down. I sure wish I wouldn’t of gotten that shot for him.

    Reply
    • Ingrid
      February 4, 2016 at 5:49 am (4 months ago)

      Contact your vet immediately, Christy. If your kitty is having a reaction to Convenia, he may need aggressive supportive care.

      Reply
      • Christy
        February 5, 2016 at 6:19 pm (4 months ago)

        I did and he’s doing a lot better thanks

        Reply
    • Mary Ann
      February 4, 2016 at 3:50 pm (4 months ago)

      Have your vet show you how to give subQ fluids to your car at home every day. That will bypass the stomach. Hopefully as the med wears off, your cat will stabilize. Maybe get appetite stimulators too. I had to do both of these things for my cat. Let us know what happens!

      Reply
      • Christy
        February 5, 2016 at 6:18 pm (4 months ago)

        Yep doing both those and he’s doing A lot better

        Reply
        • Ingrid
          February 6, 2016 at 5:46 am (4 months ago)

          I’m so glad to hear this!

          Reply
    • Carla trappett
      February 20, 2016 at 1:25 pm (3 months ago)

      My cat was given convenia early December,I nearly lost her she was so ill ,she is only two and a half years old ,she is past the 65 day period now thank god, but still not hundred percent yet ,eg,shaking head ,itching,small scabs on head and tail base and licking genitals,had blood tests and other tests. I really think this injection messed up my cats immune system. To help her through this I gave her forti flora probiotic which helped her ,kept constantly getting water into her via syringe at first , giving her little meals often, kept persevering,omega 3 fish oil one quarter of capsule every four days and lots and lots of love.

      Reply
      • Ingrid
        February 20, 2016 at 5:15 pm (3 months ago)

        I’m sorry this happened to your cat, Carla. I’d continue with the probiotic and omega-3’s to provide ongoing immune system support. It sounds like it’s working, even though she’s not back to normal.

        Reply
        • Carla
          May 15, 2016 at 5:52 pm (2 weeks ago)

          Thank you Ingrid x

          Reply
      • Mary Ann
        February 20, 2016 at 7:13 pm (3 months ago)

        Carla,

        It’s been almost exactly four months since my Olive (3 years old) was injected with Convenia, and since then, I’ve been giving her FortiFlora, Prozyme (a digestive aid), Omega 3 oils, plus other things sporadically, like Lysine and other probiotics. In the beginning, I gave her subQ fluids at home, which the vet taught me how to do years ago.

        Slowly, she began to recover, but then she developed some behavior problems — kind of like a feline PTSD, where she would run under the bed and hide for no reason, something she NEVER used to do. It was so hard to see her suffer in that way. So she’s now on a gentle antianxiety med called BuSpar (buspirone), and that drug, more than anything else I’ve given her, has started to bring her back. I think it’s helping her recover from the trauma so that her own immune system can do its thing. I got the transdermal version, where I put a little dab on her inner ear twice a day. She’s been on it now just over a month, and I started seeing results about two to three weeks in. (Just FYI, BuSpar is non-addictive and has very few side effects. It’s truly a wonderful medication.)

        My heart goes out to you, as I know how difficult this ordeal is.

        Reply
        • Carla
          May 15, 2016 at 5:56 pm (2 weeks ago)

          Thanks ,Mary Ann , how is olive ? X

          Reply
  4. Sarah
    January 24, 2016 at 6:35 pm (4 months ago)

    Does anyone know why the US product information for Convenia lists only the adverse reactions reported in foreign market experience and not the adverse reactions reported in the US?

    Reply
  5. Vicki
    December 13, 2015 at 4:57 pm (6 months ago)

    Anyone have a kitty that has had trouble with yeast in their ears months after a Convenia shot?
    Can’t seem to get rid of it. The vet cleaned one as it had a huge plug of wax and yeast in it. His eardrum burst (or was already burst) and he had to go back on antibiotics (not Convenia) for 28 days – I stopped at 3 weeks because the yeast is back again!
    He had a Convenia shot back in March and I can’t seem to get the yeast to stop…he was on probiotics but he hasn’t been eating his wet food and the probiotic powder goes on that.
    I don’t know if this is a side effect of the injection but the timing sure fits.
    thanks

    Reply
    • Vicki
      December 13, 2015 at 5:57 pm (6 months ago)

      Mary Ann I can’t seem to see your reply on here – only via email.
      This is a new vet and we are in a new city, new state…I’m not finding any of the vets here that terrific and there aren’t many to choose from. The Convenia injection was given by my old vet.
      I’ve tried apple cider vinegar, silver oxide, and anti-fungal drops. Nothing seems to make it go away completely. It was almost all gone this time…except the big plug. That is why he removed it…then back on the antibiotics again. It all started with the Convenia injection.
      I wish I had more options here. No holistic vet within an hour of here and it stresses my guy to drive anywhere. I’m finding that most of the vets here concentrate on dogs and horses not cats.
      Thanks for your thoughts.

      Reply
    • Ingrid
      December 14, 2015 at 7:21 am (6 months ago)

      Yeast infections are a common occurrence after antibiotic use, regardless of the type of antibiotic given. You may want to consider adding a good probiotic to your kitty’s diet. I recommend the Dr. Goodpet product http://amzn.to/YRaNcE

      Reply
      • Vicki
        December 15, 2015 at 7:46 am (6 months ago)

        Thank you Ingrid. I will try that brand next.

        Reply
    • CHERYL
      February 23, 2016 at 1:25 pm (3 months ago)

      You say his eardrum burst? Before or after the vet removed the wax? I know a cat that had similar problems and the vet “accidently ” removed his eardrum which resulted in neurological symptoms.

      Reply
      • Mary Ann
        February 23, 2016 at 3:18 pm (3 months ago)

        My cat hasn’t had this particular problem, but I would think a large daily dose of a great probitic would help. I spent a huge amount of money on a holistic vet to help my Olive overcome her symptoms, and he recommended the brand RxBiotics, put out by RxVitamins for Pets. I also give her FortiFlora by Purina as she loves the taste. She’s not crazy about the RxBiotics, but I think she’s in the minority as most reviews are excellent. At least with the FortiFlora, she’s getting probiotics every day. I think any kind of acidophilus would be a huge help for any kind of yeast problem. Good luck! …. Mary Ann

        Reply
  6. Sarah
    December 13, 2015 at 12:51 am (6 months ago)

    I had to put down my beloved Betty Boo, aged 7, on 14 November, 65 days after she was given Convenia and antihistamines for flea dermatitis. During this time she was admitted twice to the vet hospital and treated with sedatives, amoxyclav, several courses of doxycycline and two injections of dexamethasone. Blood tests done in late September showed anemia and red blood cell abnormalities. A biopsy of her ulcerated mouth and swollen paw done in mid-October (because the vets had never seen such a condition) concluded that the condition was not eosinophilic granuloma, as the vet had initially thought, but a possible adverse reaction to Convenia, possible food allergy or possible contact irritant. By the time she was put down, she was showing signs of severe toxicity — fur loss from her chest and front legs, constant dark drool, front paws swollen so severely she could not walk on them, with crusty black deposits, pads turning black and black spots on her skin. The day before she was put down, a pad on her rear foot started to turn black.
    In the last week of her life and after she was put down, I realised that the treatment she had been given was completely inappropriate — amoxyclav, because it is a cephalosporin antibiotic like Convenia, doxycycline because the Convenia product information specifically states that there is a risk of an adverse reaction from concurrent use with Convenia (and the doxycycline product information says it should not be given concurrently with any other antibiotic), and corticosteroids, because they have been known for over 20 years to exacerbate the toxicity of other agents (see, e.g. Sapolsky RM. “The physiological relevance of glucocorticoid endangerment of the hippocampus”. Annals of the New York Academy of Sciences, 1994; 746: 294-307.)
    The vet hospital reported Betty Boo’s reaction to Zoetis which has listed it in its global database but concluded that it was unlikely to be attributable to Convenia.
    When I went back through BB’s records, I realised that she had been given at least six Convenia injections, and that three different vets had prescribed doxycycline following Convenia. (Luckily, the first time this happened, in 2012, I had not given the doxycycline, as the symptoms had already cleared up.)
    I am absolutely heartbroken that I did not realise the dangers of Convenia and of this inappropriate treatment in time. The most important lesson that has come out of this for me is the vital necessity for any pet owner of researching any drug and reading the product information for it carefully before it is administered. Had I read the product information more closely, I would have known that doxycycline was not appropriate following use of Convenia. While that was not the only drug that exacerbated her condition, at least I could have limited the damage.
    As long as Convenia remains on the market, I believe there needs to be a protocol stating clearly what treatment is appropriate during that two-month elimination period and what is not appropriate. Most drugs are eliminated from the body in a few hours or a few days. A drug that stays in the body for over two months is obviously in a totally different category and requires far greater precautions in its use. It was six weeks after the injection before the biopsy results came back implicating Convenia, six weeks during which the use of Convenia was not adequately taken into account in deciding on treatment. So where Convenia has been administered, it is vital to know what can safely be administered without causing an adverse reaction, or exacerbating one if it has already occurred.
    My only hope now is that what happened to Betty Boo will help save other animals from suffering the very severe poisoning that led to her death.

    Reply
    • Ingrid
      December 13, 2015 at 7:38 am (6 months ago)

      I’m so sorry about Betty Boo, Sarah. Stories like yours perfectly illustrate how cavalier so many vets are about using this drug without researching the possible consequences and interactions with other drugs. It should not be up to the pet owner to research possible drug side effects or interactions, but you are absolutely right, it is vital.

      Reply
      • Sarah
        December 13, 2015 at 5:33 pm (6 months ago)

        Thank you, Ingrid. Unfortunately, it is now up to the pet owner (or the patient) for, as I have learned from my own and from BB’s experience, there is no other way to ensure that dangerous treatment is not being used. What distresses me is that it is possible that she could have survived her initial adverse reaction had it been treated appropriately. But there seems very little knowledge of what can help an adverse reaction to Convenia. I have seen probiotics and IV fluids mentioned but only briefly. It would be good to know what, if anything, can be done when reactions are not immediately life-threatening. That’s why it seems to me that a protocol is really needed.

        Reply
        • Paula
          December 30, 2015 at 7:57 pm (5 months ago)

          My cat was giving this drug yesterday for a bad laceration on his face. I was not informed at all about the side effects or was given a choice. The vet acted like the shot was nothing. It wasn’t until I researched it after the fact that I find out the truth. I have been scared sick and have spent so many hours worried about my cat. It has now been 24 hours since he received the shot. I am just terrified that he is going to get sick and die any moment. I will be reporting the vet to my state’s vet board. I think they should have to inform us about the medicine before they give it.

          Reply
          • Sarah
            December 31, 2015 at 10:01 pm (5 months ago)

            Paula, I am not a vet but I lost a beloved cat in November following Convenia and subsequent treatment with antibiotics and corticosteroid drugs. She had been given half a dozen Convenia injections before without immediately reacting. So your cat may not necessarily have an adverse reaction straightaway and it may not necessarily initially be severe (for my cat, it began with drooling eight days after the injection). My suggestions would be 1) keep a very close watch on your cat for anything that may indicate an adverse reaction and be aware that this may occur at some remove from the time of the Convenia injection; 2) read the Convenia product information closely and make a note of all the listed drugs that should not be given concurrently with Convenia, i.e. during the 65-day elimination period (you may find, as I did, that vets are not aware of the drugs that should not be given concurrently with Convenia, e.g. doxycycline; it is important that you are aware of them); 3) don’t allow your cat to be treated during this 65-day period with any other antibiotics from the cephalosporin family, such as amoxyclav, as any adverse reaction to Convenia risks being exacerbated by treatment with other antibiotics from the same family; 4) don’t permit treatment during the 65-day period with corticosteroids: steroids are given as anti-inflammatories but can also have a pro-inflammatory effect and they exacerbate the toxicity of other agents; and 5) be aware that even if your cat does not have an adverse reaction to Convenia this time, that does not mean it might not occur with another administration (which obviously you won’t allow!). I suspect that Convenia causes long-term damage to the immune system and blood cell production: my cat had had a number of Convenia injections before I realised the risks, and blood tests over three years showed anaemia and red blood abnormalities. During this period she had episodes of drooling, ulcers and skin irritation with no cause ever identified. 6) If possible, research any drug proposed as treatment for an adverse reaction to Convenia before it is administered — apart from the risks of individual drugs, there is always the risk of an interaction, especially important when one of the drugs is not eliminated for 65 days, as is the case with Convenia. And finally (7), though I wasn’t able to try this myself, there is online advice suggesting that animals given Convenia should be given probiotics as soon as possible to restore intestinal flora and that this treatment should be continued for some months. Search for the “catlady”‘s comments on this thread. And yes, you are absolutely right that vets should inform pet owners of the risks of Convenia; alas, it seems that vets are often not aware of these risks themselves. Personally, I think the product manufacturer and registration authorities should be more proactive in ensuring that vets are adequately informed.

          • Ingrid
            January 1, 2016 at 5:51 am (5 months ago)

            Thank you for this detailed list of recommendations, Sarah. This is exactly what vets should be telling their clients BEFORE administering the drug!

          • Patty Rockwell
            January 1, 2016 at 1:41 pm (5 months ago)

            My cat received Convenia for a hot spot under a mat two years ago. She was a bit listless for several days, but fortunately had no other side effects. (She also received a 1 yr rabies vac on the same day.) However, I was a nervous wreck for several months worrying about a delayed reaction.

            I was not given any information about this drug ahead of time. The vet merely trimmed the mat & injected her without asking me for my consent. When I confronted the vet’s office after I found out about Convenia her tech became defensive & said it was a great drug. I contacted my prior vet & they also defended the drug. Both vets are cats-only practices. It was clear from their responses that they consider those of us bringing up the dangers of Convenia are some kind of troublemakers. However, a mixed-animal house call vet immediately cited the known side effects of the drug & was not at all in favor of its cavalier use. Egos should not be standing in the way of enabling us to advocate for the safe care of our animals.

  7. Paulie
    December 7, 2015 at 6:58 am (6 months ago)

    My cat was 17 years old. She stopped eating because there was something wrong with her mouth, she looked in pain after she ate and would paw at her jaw… It looked like her gum was sticking out and swollen so I took her to the vet. She gave her a 2 week shot, I am assuming it is this medication.. The problem is, my cat was weak, only weight 3.6 pounds, even though she is a very small cat.. still was very bony. The vet said she had something in her mouth that looked like a small tumor… and the other side was a tooth/gum infection. She also gave me appetite simulators and a pain killer injection, IV fluids because my cat was very dehydrated. After the trip to the vet my cat just got worse and worse.. She became very lethargic, and out of it, and stopped eating and now also stopped drinking water. On top of that she stopped using the liter box completely. I was force feeding her injecting food into her mouth as the only way to get her to eat.. She still wasn’t using the bathroom.. almost a week later, my cat didn’t pee or anything… and just was getting weaker and weaker and laying in the same corner all day and night.. I tried feeding her again one day and she like choked went into a convulsion and died,, but came back to life and started breathing again.. but she was just laying there like half dead lumbering to breath and moving her paw in a weird way ever 30 seconds. I had to put her to sleep.. I am heart broken, she was my best friend for over 17 years.. a true angel.. Now Im reading this and thinking that maybe the antibiotic finished her off and killed her. I won’t know for sure because she was old and could have been dying anyway.. but now I feel guilt that I might have done the wrong thing… Just wanted an opinion from someone on this.. and what you guys think.

    Reply
    • Ingrid
      December 7, 2015 at 7:28 am (6 months ago)

      I’m so sorry, Paulie. It sounds like your kitty was already pretty sick, so it’s impossible to tell with any certainty whether the Convenia contributed to her decline. Even if it did, you did nothing wrong! You trusted your vet, who should have informed you of the potential risks of this drug. Sadly, far too many vets either aren’t informed about the risks themselves, or neglect to inform clients of them. Every drug comes with side effects, the issue with Convenia is that there’s often not much that can be done once they occur because the drug stays in the cat’s system for such a long time.

      Reply
    • Stephania
      December 7, 2015 at 7:03 pm (6 months ago)

      I am really sorry Paulie. Take comfort in the fact that you gave her the best life possible and she made your life better as well, you both did an amazing thing for each other and she would not want you to be sad. Based on what you describe it was time for you to make the hardest decision and let her rest. You did the right thing. As far as the convienia there is a good chance that it caused her to further decline but you didn’t do anything wrong. Veterinarians are prescribing this drug too often and not for the indications in the instructions. It should really be reserved as a last line of defense. Due to your kitty being so ill they might have thought it was the only way to get the medicine into her. I pay to have my medicine for Goat compounded at a compounding pharmacy. You can make it into a flavored liquid or I get the trans dermal cream I rub on her ear. Just in case you need to ever give a pet antibiotics in the future, there are options if pills do not work. At any rate 17 years with your wonderful kitty was a blessing and you will never forget her. Take care of yourself and do not spend any time blaming yourself and doing the what if game, you did the best you could for your kitty.

      Reply
    • Paulie
      December 7, 2015 at 11:06 pm (6 months ago)

      Thank you for the kind words. Maybe it was just her time, but she was a tough little cat. She still looked like a kitten even at 17. Its one of the saddest thing I have ever been through. She wasn’t an ordinary cat. I know everyone says that about their own pet, but in this case its the truth. She was A LOT smarter than an average cat, and very affectionate. She helped me get through some very tough times in life and now I can’t picture her not being around. I buried her in my back yard where I found her as a baby. The whole ordeal made me sick and I really hope I didn’t cause her to die faster.. Even a couple more years I would have been more at peace with it. She definitely deserved and had the toughness to live to at least 20

      Reply
    • Paulie
      December 7, 2015 at 11:08 pm (6 months ago)

      Thank you. Yeah I’ll never know. But even if I could have gotten another year or two out of her it would have made me very happy. 17 and a half was too young for this cat to go. That might sound crazy but I would have been more at peace of she lived a little longer. She didn’t have diarrhea, she wasn’t going to the bathroom at all. No pee or poop. I don’t know if the medicine could do that or not, so perhaps she was on her way out anyway

      Reply
  8. Mary Ann
    November 14, 2015 at 4:11 am (7 months ago)

    My cat was given Convenia exactly three weeks ago today. Right after the shot, she had extremely lethargy, to the point where she couldn’t even stand in the litter box to poop, and so a week later needed an enema. During this time she was treated every other day or so with fluids and B12 shots. By Day 10, her energy began to come back, but that’s when her lack of appetite started, and it’s been getting worse ever since.

    I’ve tried everything I can think of. In the beginning the simple things seemed to work, like tuna juice, baby food, FortiFlora on everything, eating Fancy Feast etc. (she usually eats high quality grain free food), but as things got worse, she was put on an appetite stimulant, mirtazapine, that seemed to work (it’s given every three days), but she’s now on her third dose, and while she ate right after being given it this morning, she’s had nothing since, and it’s about 3 a.m.

    Has anyone out there had such a severe case of inappetance in their cat? Does anyone have any suggestions as to how to handle it? After all this, I’d hate to lose her to her not eating anymore. She has her personality back…her playfulness and her affection…but not that appetite (which was fine those first ten days).

    I’m so tired from staying up nights with this ordeal. I hope I’m making sense here. Oh, and I gave her Pepcid tonight with no results.

    Thank you so much!
    Mary Ann

    Reply
      • Mary Ann
        November 14, 2015 at 8:50 pm (7 months ago)

        Thank you, Ingrid! As for the tips, I used them all when Olive moved in four months ago and had trouble eating just from “new home” anxiety, and they absolutely worked! But this is a whole other level of inappetance.

        I spoke with a friend who has a rescue tonight, and she suggested that I hire a freelance vet tech to come to my house to administer Olive her fluids and meds. She suspects Olive is experiencing acid reflux, as she has thrown up bile twice, and is recommending Pepcid. I did pill Olive with Pepcid last night, and she ate this morning, but it was so traumatic getting it into her, I’m not sure I want to do that again to either her or me. So this vet tech idea sounds great for the short term, particularly if it helps get her eating.

        But if this all goes on too long, I will definitely consider this feeding tube! All of the comments were so positive, and they were from people who’ve actually done it. The only negative comment was from someone who just didn’t like the idea. I thank you very much for that! It gives me great relief to know that I have an option like this. I will absolutely discuss it with my vet first thing Monday morning. Thank you!

        Reply
        • Cheryl
          November 14, 2015 at 10:03 pm (7 months ago)

          Has anyone suggested Carafate? It coats the stomach and is used for ulcers.

          Reply
        • Ingrid
          November 15, 2015 at 6:50 am (7 months ago)

          I’m glad the information helped, Mary Ann. Please keep us posted on how Olive is doing.

          Reply
          • Mary Ann
            November 15, 2015 at 9:39 am (7 months ago)

            Thank you for the suggestion Cheryl! I’ll check it out.

  9. Barb Wyatt
    November 7, 2015 at 1:56 pm (7 months ago)

    We have a cat, who the vet estimates is about 11 or 12 years old that we trapped and took into our home in Jan, 2014, during a week that it was so cold, public school was cancelled the entire week due to temperatures. We had fed him a outside for 2 years prior. It took over 2 weeks to trap him, first trying a live trap then succeeding with a drop trap. We couldn’t even touch him for the 1st 2 weeks or so. He sleeps with my husband and I at night and allows us to pet him but you cannot pick him up and during the day, in the rest of the house, he still doesn’t allow us to touch him much. In the 22 months he has been in our home, he has had at least 4, if not 5 Convenia shots because trying to give him pills is a 45 minute anxiety ridden debacle. Trying to chase him down and catch him only makes him angry and when you are able to get a pill or liquid medication down him, he spits it out, hence the reasons for the Convenia shots. He has herpes, so he receives Lysine daily in his food. He has had multiple bacterial infections while he has been in our home, I suspect from years of being on his own and having to fend for himself, eating whatever he could find and getting into to scraps with other animals, including wildlife. He now has a kidney infection, found only after spending overnight at the vets, because he was inappropriately urinating around the house. He was once again treated with a shot of Convenia and a shot of Flocillin. I have 5 other cats, to whom giving meds to is not an issue so I might never give Convenia to them but for Bob, our “stray that will stay”, it’s the only way to treat his infections. For Bob, my feeling is, if he were to succumb to one of these shots, that one day in our home was better than all the years he had spent outside on his own. He has a heated bed, treats to eat, dry and wet food daily, filtered water from a cat water fountain, and people that love him more than he will ever know who are trying to make up for the fact that someone, years ago, dumped him and left him and did not love him.

    Reply
    • Ingrid
      November 7, 2015 at 3:51 pm (7 months ago)

      There are some situations, like yours with Bob, where Convenia is the only viable option as long as it’s given with fully informed consent of the potentially severe side effects. Since Bob has been able to handle it in the past, chances are, he won’t have any problems this time, either. I agree with you that in his case, the stress of giving pills to him outweighs the risks of the drug.

      Reply
  10. James Blair
    October 20, 2015 at 4:53 am (7 months ago)

    A wounded ear from a cat fight sent me to the vet with my cat. Offered the
    convenience of Convenia over a pill antibiotic, I accepted, not knowing that in 24 hours my otherwise healthy cat would be dead. The veterinarian claimed this was a rare case and apologized, she also contacted the Convenia company that agreed to pay the medical bills. The vet meant well,
    and I did too. A sad situation, and if I had known there was any danger
    I probably would have not requested using Convenia.

    Reply
    • Ingrid
      October 20, 2015 at 6:08 am (7 months ago)

      I’m so sorry, James. The lack of informed consent about this drug in the veterinary community is unconscionable.

      Reply
      • Cheryl
        October 20, 2015 at 12:22 pm (7 months ago)

        There must be something we can do to let other cat owners know.

        Reply
  11. Stephania
    September 22, 2015 at 8:02 pm (8 months ago)

    My cat Goat is fighting for her life right now. I took her to the vet yesterday because I haven’t been able to solve her itchiness problem. They said that I should change her food again, treat her for fleas even though there is no evidence, and give her an anti-biotic shot for the little wounds under her chin. I didn’t think anything of it. They put her back in her carrier and off we went. About an hour later she was eating treats I gave her laying down on her side, very strange. I watched her and she got up and kept falling over. I took her to her water and she drank the whole bowl. She was walking very strange and falling. I took her to the emergency vet and he literally knew nothing. I showed him what the vet had done that day and he thought it was the flea medicine. I had only gave her a half dose. I then waited for the vet to open when I found her this morning covered in her own urine and couldn’t walk at all. She would just topple one way or the other. I took her to the vet who did this to her, blaming the frontline and I asked “could the antibiotic have done this?” She said there way no way. They have had her on fluids all day and she has not improved. They want me to take her home and bring her back for more fluids in the morning. I do not know if that is doing any good. I am going to start the benebac and I will report what happens. I believe I am going to lose her and I am so angry. The vet cannot be more than 25 years old and she does not know what she is doing. She did not culture the chin sore and she did not warn me, I would have said “no” and washed it and put some neosporin on them. It was so unnecessary. She has obviously not read the pamphlet. This drug should have been used as a last resort. I am so devastated. I don’t know whether I should hang on, or just let her go now. I don’t see any other people saying the cat had severe ataxia and getting better. I have always said I would not let her suffer, I just don’t know when to give up.

    Reply
    • Ingrid
      September 23, 2015 at 5:49 am (8 months ago)

      I’m so sorry, Stephania. It is endlessly frustrating to me how cavalier so many vets are about using this drug, and how there is no informed consent for cat guardians before the drug is given. All my best to Goat for a complete recovery.

      Reply
    • Tamela
      September 23, 2015 at 10:51 am (8 months ago)

      Have her red blood cells checked. My cat had similar symptoms and it was hemolytic anemia. She had to have a blood transfusion. She’s still alive a year and a half later but she’s still sick.

      Reply
      • Stephania
        September 23, 2015 at 1:40 pm (8 months ago)

        Tamela, they checked her RBC yesterday morning. She was 1 below the low range but she has been in the beginning stages of kidney failure. The vet has called zeotis and consulted. She did agree to run the RBC again if I wanted. I am not sure what to do right now. Has anyone ever heard of a cat recovering from ataxia? I cannot find anything at all. I asked the vet to use her resources and see if she could find a case to help me make a decision. She of course is saying that Goat is not suffering and she may learn to live like this. I do not want that for her. My poor baby, I will turn around and two minutes later she has rolled or done something to get a few feet from where I left her. She is on fluids again today. She ate, drank, and slept last night. I got her to use the litter box a few times. In case anyone reads this searching for how to help a cat with ataxia when the vet cannot help, I was really worried I wasn’t going to be able to get her to use the litter box as she falls over. She wouldn’t go at first with me holding her but then she went a few times. I try to give her independence and help her as little as possible so I kind of just prop her up with one hand and look away. She also would not use the lower sided small litter box, she would hate me every time I would put her in there. So I took her to her big usual litter box and cleaned it really well as I knew she would fall, and she wanted to go in right away.

        I called a vet that is supposed to be 50 years of experience and they do laser therapy on ataxia and have had a lot of success. I just don’t know because she was poisoned but I suppose the poison has acted on her central nervous system the same as any other reason they would.

        Reply
        • Stephania
          October 12, 2015 at 2:33 pm (8 months ago)

          ATAXIA CAN RESOLVE. I wanted to post an update for anyone reading this with their pet in a similar situation. Goat was able to walk if we held the end of her tail 72 hours after first poisoned. So she had 4 days of intravenous fluid about 10 hours at the vet. The vet obviously was horrified this happened to a cat she saw the day before who was generally healthy and I believe spent a lot of time trying to get her to walk. She called me very excited that if you held onto the end of her tail she could walk. It was true, she could go about 10-15 feet before falling over. I still had to carry her everywhere and help her use the litter box.

          The litter box was the worst part, but if this is happening to you it could be temporary. I just kept it spotlessly clean and lowered the entrance so she didn’t have to climb in there. I would hold her tail or her side so she could go.

          On about day 5 she could get herself up off the floor and walk 5-10 feet by herself before falling over. I will say her normal noisy behavior was non-existent. She was very quiet. I made a soft blanket bed on top of a comforter on the floor with her food, water, and low sided and normal litter box nearby.

          I had to keep working full time so I hired a babysitter. Yes, I hired my cat a babysitter. I bought a $9 baby gate online and blocked the stairs. The babysitter agreed to work for a reasonable fee since it was only a cat who basically slept all day. I had her there to watch her because she didn’t like the low sided litter box and would go in the big one, fall getting out and flop on her side. Then drag her back end out of the bathroom and not be able to stand. The sitter was there to keep the litter boxes spotless, feed her wet food more often with benebac powder mixed in. I felt it was more important for her to eat than for her to get the full dosage of benebac so I would just sprinkle in enough that she couldn’t taste it and will still eat.

          On about day 14 she can jump again. She is also back to being noisy and loud. On day 17 I let her do the stairs and she can go up and down on her own. She does still sway to the right some but doesn’t fall down any more. I believe she may always walk a bit funny but am so grateful this didn’t kill her and I get more time with her.

          Goat was 18 years and 4 months old when she was poisoned by Convenia.

          Reply
          • Ingrid
            October 12, 2015 at 4:33 pm (8 months ago)

            Thank you for sharing your experience, Stephania. I’m glad Goat recovered and you get some more time with your girl.

          • Debi
            October 12, 2015 at 11:05 pm (8 months ago)

            Goat is a lucky kitty to have such a caring Mom as you, Stephania! Wishing her continued health and many more years together!

  12. Cheryl
    September 5, 2015 at 7:44 pm (9 months ago)

    My kitten has a URI and has been taking azythromicin. Yesterday he received a convenia injection. By evening he was having trouble walking, his head is pulled to the right, his pupils are not equal, and he’s stopped eating and drinking. The eye with the conjunctivitis is now a pin prick and the other is over dilated. I’m not sure he can see. The vet says maybe an ear infection or a scratched cornea. I’m desperate.

    Reply
    • Ingrid
      September 6, 2015 at 5:59 am (9 months ago)

      I’m not a vet, but this sure does not sound like an ear infection or a scratched cornea to me, Cheryl. Your kitten may need aggressive supportive care to help him through this, Cheryl. If your vet is closed over the weekend, contact an emergency clinic. All my best to him for a complete recovery!

      Reply
      • cheryl
        September 23, 2015 at 11:22 am (8 months ago)

        Thanks for your help. My vet agreed to report the reaction. She had never heard of this reaction. My kitten has completely recovered. It took time and I never left his side. I fed him baby food and water with a syringe. I also gave him some karo syrup. The last symptom to go was the unequal pupils.

        Reply
    • Catlady
      September 7, 2015 at 10:15 pm (9 months ago)

      This is a Convenia reaction. Your kitten is suffering from Ataxia, which includes the symptoms of trouble walking and the head tilt.You need to bring your kitten back to the vet asap and insist they treat as such. Ataxia is a documented adverse reaction to Convenia and the other symptoms do NOT happen as you describe this quickly from an ear infection or are they usual. Be prepared for your vet to deny it’s a reaction and have to find a different vet that takes you seriously. Sadly it happens all the time and is documented regularly on the Convenia Adverse Reactions Facebook page.

      Reply
      • cheryl
        September 23, 2015 at 11:10 am (8 months ago)

        Please don’t put her down yet. My Cedric went through the same thing. It took some time but he gradually improved. I took him to the vet and told her it was the convenia. She looked it up and agreed to report it. The shot was given to him without my knowledge for a uri. He will never have it again. Today he is the same kitten he was before. So hang in there and best of luck.

        Reply
        • Stephania
          September 23, 2015 at 2:01 pm (8 months ago)

          It is just so heartbreaking to see her lose her independence. She cannot walk more than 3-4 steps and she always falls to the right side. I am so glad your baby got better. She is 18 though so compared to your little guy I do not know if she has a chance. I am trying to stay positive. I will say though that other than the itchiness even the vet said before the shot that she was in very good health for being so old. I noticed her skin and hair and vomiting got a lot better when I switched her to all the lowest phosphorus food I could find, many of which are grain free. I have not fed her prescription kidney yet because they are mostly filled with junky fillers. It is so sad to watch her struggle. I don’t want to rush ending her life but I also do not want her suffering.

          Reply
          • Stephania
            September 23, 2015 at 2:04 pm (8 months ago)

            I should also add that if you cat is ever throwing up a lot, always get their blood pressure checked. Hers was double what it should have been and she had been vomiting for 11 years. My vet always said she had a sensitive stomach but sure enough 3 days after starting her on blood pressure meds, she stopped throwing up and has only had hairballs since.

    • Catlady
      September 7, 2015 at 10:29 pm (9 months ago)

      Here is a highlighted version of the Convenia drug insert that lists the documented adverse reactions under “Foreign Market Experience.” I would suggest you print it out and bring it with you to show the vet as most never read the insert and don’t seem to know the long list.
      https://drive.google.com/file/d/0B9RU-CwPFwVRMWIxVU9vT1VEbDA/view

      Reply
      • Ingrid
        September 8, 2015 at 6:15 am (9 months ago)

        Thank you for sharing this link.

        Reply
  13. Pat
    August 12, 2015 at 11:41 am (10 months ago)

    My lovely cat, who was very active and chatty, last week (Thursday) had a tooth problem. We took her to the vet who advised the teeth come out either this week or next, we opted for next week. She then gave her an anti-inflammatory and Convenia injection.

    We brought her home and she was vomiting all night, now (Wednesday) she has stopped eating altogether and is not drinking. She is also very limp. We are taking her to the vet tonight, but will they admit or even consider that it is Convenia induced?

    VERY WORRIED!

    Reply
    • Ingrid
      August 12, 2015 at 2:30 pm (10 months ago)

      You need to contact your vet right away, Pat. It doesn’t matter whether they’ll consider that Convenia is responsible for her lethargy an vomiting, she may need immediate supportive treatment. All my best to her for a quick recovery!

      Reply
  14. Sara
    August 7, 2015 at 11:31 pm (10 months ago)

    This is a first for me! I felt that I had to comment, or more appropriately post my thanks for this website and the posts. I carried my 7 yr. Bodhi to the vet for an infection of the nail bed on June 24th. He was given an injection of Convenia and scheduled for a biopsy on June 30th. By the 28th he began to have diarrhea. When I carried him to the vet for the biopsy, he started him on a probiotic. By July 2nd his diarrhea had gotten worse, he was lethargic and was not eating, I carried him to the vet as an emergency. He was given an injection for nausea. Prior to getting the Convenia he was in good health, eating well, and his stool was normal. He was playful and sociable. As he seemed to be getting worse I decided to go online to get info on Convenia. This site is one I came across. After reading the comments and seeing the recommended site for Dr Lisa Pierson and reading what she had written about Convenia, I decided to take Bodhi to a Veterinary Specialists Hospital on July 3rd. He was given IV fluids, a feeding tube was put in and he had a complete blood work up done. I expressed my concern that he was having an adverse reaction to the Convenia. The vet was sceptical that Convenia would be causing his diarrhea, but she did not completely rule it out. With an ultrasound and blood work done three times, they could not find a reason for the anemia and diarrhea. I brought him home on July 8th. He still had some diarrhea, but was eating fairly well. The diarrhea was resolved by the 13th. 19 days from getting the Convenia. Thankfully he is doing well now, but we will not be past the 65 days that it takes for 97% of the drug to leave his system until the end of this month. Had it not been for coming across this site and Dr. Pierson’s, I’m not sure that I would have taken Bodhi to a Veterinary Specialists Hospital where he received care 24/7 and the treatment that saved him. I’d like to add that my vet has been in contact with Zoetis, and I am in the process of filing an adverse reaction report to the FDA and Zoetis.

    Reply
    • Ingrid
      August 8, 2015 at 6:19 am (10 months ago)

      I’m glad that Bodhi is doing well, Sara. Your story shows that in many cases, quick intervention and aggressive supportive care is critical when there is a reaction. All my best to Bodhi for a full recovery!

      Reply
    • Debi
      August 8, 2015 at 11:45 am (10 months ago)

      Great job, Sara! I am so happy for you and Bodhi! I’m amazed that so many vets still don’t understand the reactions to Convenia. Best of health to you both!

      Reply
  15. Cammy
    May 16, 2015 at 9:33 pm (1 year ago)

    Hello , yesterday I took my 11 year old cat brown sugar to the vet , she had a UTI. The vet gave her a shot of convenia and now all she has been doing is sleeping , resting and not eating or walking around. I’m very concerned after seeing all the bad incidents caused by convenia. Will she be okay ? She’s purring and she has used the litter box fine without urinating on the ground like before. I just don’t want her to die due to this drug.

    Reply
    • Cammy
      May 16, 2015 at 9:35 pm (1 year ago)

      She also seems weak.

      Reply
      • Tamela
        May 17, 2015 at 9:17 am (1 year ago)

        Watch for panting or breathing through her mouth. Cats will almost never do this. If you take her back to the vet ask them to check her red blood cell count. My cat was weak right after and had developed hemalytic anemia. She needed a blood transfusion. You may need to take her to an emergency vet; regular vets don’t always have the ability to do transfusions.

        Reply
        • Cammy
          May 17, 2015 at 5:41 pm (1 year ago)

          tamela , my cat is having the same issues with her hind legs after receiving convenia. Is your cat okay now ? I’m worried about mine and would like to know if yours was a positive outcome.

          Reply
          • Tamela
            May 17, 2015 at 5:59 pm (1 year ago)

            The first sign something was wrong was lethargy and diarrhea. Then she was walking across a room and fell over with her leg cramped up. I rushed her to the emergency room and they found out her body was destroying it’s red blood cells (hemalytic anemai). She was panting before the blood transfusion and her RBC had dropped to 13% (30% is the bottom of normal for a cat). My cat had the anemai, ataxia, triggered pemphigus foliacious (all autoimmune issues). I have spent $17,000 so far and she is still alive. I would pay whatever it takes to keep her with me.

      • Cammy
        May 26, 2015 at 5:54 pm (1 year ago)

        update on brown sugar : I’m happy to say she’s back to her normal self ! She’s no longer lathargic she’s eating soft cat food and she’s walking fine (: thank you all so much for your help !!! I’m so thankful convenia didn’t take her from me.

        Reply
        • Ingrid
          May 27, 2015 at 6:11 am (1 year ago)

          What a relief! Thanks for the update, Cammy!

          Reply
    • Ingrid
      May 17, 2015 at 6:35 am (1 year ago)

      You need to contact your vet immediately or take your cat to an emergency vet, Cammy. She may need aggressive supportive care. Some who have commented on this site have also had success with using probiotics to help strengthen the immune system to help their cats through the reaction to the drug, but that is not a substitute for immediate veterinary care. All my best to you and Brown Sugar.

      Reply
    • Cammy
      May 17, 2015 at 5:34 pm (1 year ago)

      she is perfectly normal as far as breathing and being alert. Her eyes are fine. Everything. But when she gets up to walk she falls over. She’s been drinking water and she has jumped down from her bedTo use the bathroom and jumped back up to get on the bed but she has trouble walking.

      Reply
      • Ingrid
        May 17, 2015 at 6:11 pm (1 year ago)

        You need to take your cat to a vet (ER if necessary) as soon as possible, Cammy. Early intervention is usually crucial for a successful outcome.

        Reply
    • Catlady
      May 17, 2015 at 6:09 pm (1 year ago)

      Cammy,
      the outcome of other people’s cats has no bearing on your situation. You need to get your cat to a vet immediately and tell them that she is having an adverse reaction to convenience. This reaction is well documented. Your cat needs medical attention now!

      Reply
      • Catlady
        May 17, 2015 at 6:10 pm (1 year ago)

        Convenia, not convenience.

        Reply
      • Cammy
        May 17, 2015 at 6:55 pm (1 year ago)

        we don’t have enough finances to take her to the vet again. I don’t know what to do anymore but pray and hope for a miracle.

        Reply
        • Ingrid
          May 18, 2015 at 6:16 am (1 year ago)

          At the very least, call the vet who gave her the injection this morning and ask for advice, Cammy. All my best to you and Brown Sugar!

          Reply
          • Cammy
            May 20, 2015 at 1:20 am (1 year ago)

            update on brown sugar. She is now walking around the house and not feeling lathargic anymore. She still struggles when walking but only on the paw that she was given a shot in. They may have struck a nerve when giving it to her . It is limp and dangles. The other paws are fine. But she is doing much better.

          • Ingrid
            May 20, 2015 at 6:29 am (1 year ago)

            I’m so glad to hear Brown Sugar is not lethargic anymore. Did you contact the vet who gave the injection? I’m concerned about pain in the affected leg. I know finances are an issue for you, but your vet may be able to prescribe pain medication without another office visit.

          • Cammy
            May 20, 2015 at 6:53 am (1 year ago)

            thank you for the concern Ingrid. She actually can not feel her leg and when touching it she doesn’t react at all. I try exercises daily with her but the paw just lays limp . I did call the vet. They said they’ve never heard of a Convenia injection causing this issue.

          • Ingrid
            May 20, 2015 at 7:30 am (1 year ago)

            Unfortunately, far too many vets are unaware of the potentially dangerous side effects of Convenia.

          • Catlady
            May 20, 2015 at 9:38 am (1 year ago)

            Cammy, this is the time that you need to become your cat’s fiercest advocate. Just because your vet has never heard of this doesn’t mean it didn’t happen. Your cat was treated for a UTI and what happened after the injection is in no way shape or form related to a UTI. There is not a coincidence here and the injection has harmed your cat. The fact she can’t feel her leg is alarming and she needs to be seen. Call your vet back, tell them this is absolutely a reaction and insist they see your cat. She has already been victimized twice. First by the shot and second by the vet’s denial. Print out this highlighted insert that clearly states ataxia IS an adverse reaction to Convenia and they should have read this and taken it seriously.
            FOREIGN MARKET EXPERIENCE: The following adverse events were reported voluntarily during post-approval use of the product in dogs and cats in foreign markets: death, tremors/ataxia, seizures, anaphylaxis, acute pulmonary edema, facial edema, injection site reactions (alopecia, scabs, necrosis, and erythema), hemolytic anemia, salivation, pruritus, lethargy, vomiting, diarrhea, and inappetance.

            https://drive.google.com/file/d/0B9RU-CwPFwVRMWIxVU9vT1VEbDA/view

  16. Cathe Dickson
    April 30, 2015 at 11:13 pm (1 year ago)

    I took my cat in because she was loosing weight, drinking lots of water and eating with no other problem. After a test she was found to be borderline diabetic and dehydrated. She was kept overnight to hydrate her and to check her blood sugar again. We picked her up in the afternoon and she stumbled out of the carrier. Later she could hardly walk with her hind legs at all. After checking the invoice she was given Convenia. After doing an extensive search I found out that one of Convenia’s side effects is ataxia which is muscle weakness. I am hoping after a few days the side effects will subside. We called the vet back and we will take her back in the morning to see what they say the problem is. Praying my kitty gets well !!

    Reply
    • Ingrid
      May 1, 2015 at 6:11 am (1 year ago)

      I’m sorry your cat had a reaction to Convenia, Cathe. All my best to her for a quick and complete recovery. Please keep us posted.

      Reply
      • Vanessa
        May 26, 2015 at 6:45 am (1 year ago)

        Hi tamela, my cat is extremely ill and I think that she is with hemolytic anemia, she had already two transfusion and is struggling for life. After yours cat transfusion she kept the pcv value normal?

        Reply
        • Tamela
          May 26, 2015 at 8:37 am (1 year ago)

          Hi Vanessa,

          My cats RBC count kept dropping over the course of several days before it stopped. They originally thought we might have to keep giving her transfusions until the Convenia left her system but after the initial big drop it only went down small amounts. She then developed the autoimmune skin condition. How long has it been since the Convenia shot? The worst of the anemia for my cat happened in the first 2 weeks.

          Reply
        • Vanessa
          May 27, 2015 at 2:36 am (1 year ago)

          It had been five days now, she had two transfusion and had only 19% pcv as per today. The donnor had 41% pcv.
          Could you please help me by email? I live in Brazil and here the vet has not the degree of study that in US, so I basically search for means to save her all day long. She is also with a severe UTI that was not responsive to clavamox, enrofloxacin and convenia. They will start meropenem now, I am very afraid!!! Please help me by email if possible?
          Rodrigues.van79@gmail.com
          Thanks for your time!!!! She is my baby and I have already spent more than $3000 in this first five days…. But I will do everything for her also. Please help!

          Reply
          • Ingrid
            May 27, 2015 at 5:54 am (1 year ago)

            Vanessa, you may want to consider consulting (via phone) with a US-trained veterinarian. Dr. Lisa Pierson offers phone consultations, and she is very familiar with the issues with Convenia. Send your request to DrPierson (at) catinfo.org. Make sure that you put “Consultation Service” in the subject line.

          • Vanessa
            May 27, 2015 at 8:34 am (1 year ago)

            Thank you Ingrid, I will contact her. I am so devasted because she had a minor cystitis has not CKD was a perfectly health pet and now she is all swollen, generalized inflamation, anemic and the UTI is still present at the moment (they will try meropenen).

          • Tamela
            May 27, 2015 at 6:52 pm (1 year ago)

            Hi Vanessa,

            I’m sorry I’m not a vet. I tell people what happened to my cat so if they see the same signs it will prompt them to go to a vet. There isn’t much more I would be able to help with.

        • Vanessa
          May 27, 2015 at 4:11 pm (1 year ago)

          Tamela, your cat had kidney injury with convenia?

          Reply
          • Tamela
            May 27, 2015 at 6:55 pm (1 year ago)

            My Cat has had hemolytic anemia and pemphigus foliaceus as her main two issues with several infections and other complications. Not every cat will have the same reactions. Your vet will likely need to run multiple tests to rule out other diseases, parasites and bacterias to determine in the Convenia is causing the issues.

    • Tamela
      May 1, 2015 at 11:51 am (1 year ago)

      You may need to have her red blood cells checked. My cat was stumbling and weak and it was hemalytic anemia from the convenia. She needed a blood transfusion (she was at 13%). Without it she would have died that night. My cat is still alive $16,000 later but we still have issues a year and a half later (the Convenia triggered an autoimmune response in my cat in the form of the anemia and pemphigus which we’re still battling). Hope your cat
      gets better. Also you may look into a malpractice suit as Convenia is only
      approved by the FDA for certain skin conditions. If your vet used it off label and it causes issues they can be held liable.

      Thanks,
      Tamela

      Reply
      • Cammy
        May 17, 2015 at 5:49 pm (1 year ago)

        Cathe , my cat is having the same issues after recieving this drug. Is your cat okay now ?

        Reply
  17. Debbie
    April 7, 2015 at 12:10 am (1 year ago)

    My sweet Izzy has Eosinophilic Granuloma (rodent mouth). She also has sores on her chin. She has suffered with it for 4 months now. My vet is giving her injections of Convenia. She has had 6 so far. She has also been on a steroid. While she is on the steroid and the convenia injection , she doesn’t heal very fast. When she is off the steriod and on the convenia then she heals faster. We are at the stage where they are almost healed now. The last time they were almost healed, 2 weeks after the last convenia injection the mouth sores came back fast and furious! My vet said Convenia is the only thing to take care of these mouth sores. This time he is going to but her back on steriods before the convenia wears out.
    I just read the concerns about Convenia and now I an really nervous! What else can my vet use besides convenia for these mouth sores?
    I have changed all her bowls to stainless steel,(Nothing touches plastic) put her on Blue Buffalo Limited ingredient Grain free Duck and potato (No chicken) cat food. I wash her bowl everyday. Can you help me heal my baby?

    Reply
    • Ingrid
      April 7, 2015 at 6:24 am (1 year ago)

      I can see why giving oral medications would be challenging and potentially painful, so an injectable drug does appear to be the better choice, but you’re going to have to weigh the risks against the benefits. However, given what you describe, it doesn’t sound like Convenia is actually curing the condition if your cat needs repeated injections. I’m assuming you’ve already gone through testing for environmental allergens and/or food allergies? You have her on a limited ingredient diet, but did you do a true food trial?

      Reply
  18. Debbie
    March 24, 2015 at 2:51 pm (1 year ago)

    I just bought the Bene-Bac plus at Petsmart. Now it mentions, provide one feeding from the table below on day 1,3,5,7 n then one feeding per wk utill weened.

    She weight is 8lbs so I feel more comfortable just given her 1 tsp in her food. However, do you only give it for day one n skip a day then again day 3 as it mention above? Help for any advice. Sorry to sound dumb but want to be careful and thinking about printing a copy of the possible side effects for my vet.

    Reply
    • Ingrid
      March 24, 2015 at 2:53 pm (1 year ago)

      I’m not all that familiar with Benebac. I checked the label. Cat’s can’t really overdose on probiotics, but Benebac has ingredients other than probiotics (sugars and FOS), which is why I don’t recommend it. I’m not saying it’s not a good product, I just prefer probiotics that are only that, without added ingredients.

      I would follow label directions for 5-20 pounds and divide the daily dose between two meals. Others who comment here who have used Benebac after their cats have received Convenia may have different advice for you. When in doubt, contact your vet.

      Reply
      • Debbie
        March 24, 2015 at 4:01 pm (1 year ago)

        Thanks for replying so fast. I am just so concern from reading other horrific stories from this shot even though it said some cats. I wanted to get her on the probiotic asap. These serious side effects should be told to us so we can make the best decision for r cats. I would had chosen the pill form if I was aware of these bad effects.
        Plus, thanks for information about this med for I am e-mailing it to my vet. I am so sorry for all that have lost their pets due to this shot for these r our children.

        Reply
    • Catlady
      March 24, 2015 at 7:47 pm (1 year ago)

      The protocol for Benebac in this situation can be seen at http://noconvenia.com Benebac is recommended because it has worked for many, so if it ain’t broke don’t fix it IYKWIM.

      Reply
      • Ingrid
        March 25, 2015 at 6:17 am (1 year ago)

        Thank you for sharing the link to your protocol, Catlady. I think any quality probiotic would work just as well, but you’re right, if it ain’t broke…:-)

        Reply
  19. Shirley Curtis
    March 14, 2015 at 5:28 pm (1 year ago)

    We just had our cat given a shot of convenia yesterday & were never told of it’s side affects,now I’m worried sick of what the reactions to him will be.

    Reply
    • Ingrid
      March 15, 2015 at 6:36 am (1 year ago)

      Keep a very close eye on your cat, Shirley, and notify your vet immediately if you notice even the slightest reaction. You may want to start giving a good probiotic immediately to support his system. The product I recommend is Dr. Goodpet: http://amzn.to/YRaNcE. Some who have commented here recommend Benebac http://amzn.to/1BGkoJ0. It contains some sugars (Maltodextrins and Dextrose) which is why I don’t recommend it. Fortiflora is readily available from most vets, although I don’t recommend it for longterm use because it contains animal digest. All my best to you and your cat.

      Reply
      • Shirley Curtis
        March 15, 2015 at 3:09 pm (1 year ago)

        I just ordered the digestive enzymes we will get then on 3-18,I hope these help he’s eating but has a loose stool.Thank You

        Reply
        • Jon Rimmer
          March 15, 2015 at 5:47 pm (1 year ago)

          Digestive problems are pretty common with antibiotics. Follow Ingrids advice, keep a close watch on him, and give hims tons of love and he should be fine.

          Reply
          • Ingrid
            March 16, 2015 at 6:11 am (1 year ago)

            Jon is correct, Shirley, digestive problems are common with any antibiotic, since antibiotics destroy the healthy gut flora. That’s where the probiotic can help. The problem with Convenia, as opposed to other antibiotics wit a half life of generally 8-12 hours, is that the drug stays in the system for up to two months after injection. Please let us know how your kitty is doing.

      • Debbie
        March 24, 2015 at 10:09 am (1 year ago)

        Oh Lord, my cat just got this shot yesterday for urinary infection. Along with all her other yearly shots. IS there any probiotic that I can buy off the shelf to get her started just n case like at Petco? I just felt so bad for her for she kept screaming n pain while she tried to pee. The vet said her bladder wasn’t full but that probable cause she trying to go every 2 minutes. She not screaming anymore so far but does seem to not be herself. But she could just be exhausted too which I hope that is all it is with her. Terrified for her n will keep n eye on my girl.

        Reply
        • Connie
          March 25, 2015 at 6:26 pm (1 year ago)

          there’s a lot of good info on the dangers of Convenia on http://www.catinfo.org and also on UTI’s.
          Dr. Pierson said most UTI’s are caused by sterile (non-bacterial) cystitis ans so antibiotics won’t do any good at all

          Reply
  20. Lyn
    February 20, 2015 at 10:29 pm (1 year ago)

    I’m now deeply concerned about this drug. My Sunderi has CKD and has a slight discharge from her stoma site. This gets cleaned every day but I thought I’d take her to the vet to get it checked and perhaps get an antibiotic cream for the .area. The vet said she’d give her an antibiotic injection. I specifically asked her if it would be ok given her kidney issues and she said it would be fine. Wasn’t until I got home and checked the name of the drug that I found so much negative info on it. Has anyone heard of a cat with CKD being given this drug? I am now worried about her as she has had anaemia which is now under control, and has been doing fine with all of our TLC. I will be devestated if a simple antibiotic causes her to crash again after all our, and her, hard work and determination.

    Reply
    • Ingrid
      February 21, 2015 at 7:31 am (1 year ago)

      I know you’re keeping a close eye on Sunderi, Lyn – if you notice anything out of the ordinary, contact your vet immediately. If she’s going to have a reaction to the drug, it would most likely happen within the first 24-48 hours, but since the drug stays in the system for up to two months, you want to remain vigilant even if she seems in the clear.

      Reply
    • Catlady
      February 21, 2015 at 2:46 pm (1 year ago)

      Hi Lyn, I’m very sorry to hear this has happened. I am one of the admins for the Convenia Adverse reactions Facebook page and I also work for a veterinarian who does not and will never use Convenia. Anemia is a common adverse reaction among many and this is very concerning. It is clearly listed in the insert that comes with the drug under Foreign Market Experience:
      death, tremors/ataxia, seizures, anaphylaxis, acute pulmonary edema, facial edema, injection site reactions (alopecia, scabs, necrosis, and erythema), hemolytic anemia, salivation, pruritus, lethargy, vomiting, diarrhea, and inappetance.
      Unfortunately, Convenia follows no rules and reactions do not necessarily happen right away. This is the main reason why vets are clueless about the dangers of this drug and assume that what are in fact true reactions are chalked up to being just another illness that happened to manifest after. Reactions can happen anywhere from hours to weeks to a month or more. The only thing you can do is watch your kitty closely and get her seen immediately if there is even a hint of a reaction. You also should get your kitty on probiotics asap. Benebac powder, which is available in 1 lb jars online, is what most people have had success with, and what my clinic has used successfully on a few patients that were injected with Convenia during ER visits and we were left to clean up the mess. Convenia pretty much kills all the good bacteria in the body, and the good bacteria is necessary for good health, so you need to supplement for a few months until after the Convenia is completely out of the system. The protocol for this is a http:/noconvenia.com I would also have a serious one on one discussion with your vet about this and make sure they put NO CONVENIA on your chart.

      Reply
      • Debbie
        March 24, 2015 at 3:32 pm (1 year ago)

        Catlady, do u mind if I e-mail my vet about your comment on Convenia so he may be aware of these other side effects? He has no clue about how long it can last for he only mention 2wks n never mention any side effects. Not sure if it will help him but better than no information.

        Reply
        • Ingrid
          March 24, 2015 at 3:39 pm (1 year ago)

          Feel free to send the link to this post to your vet, Debbie.

          Reply
  21. Ada
    February 9, 2015 at 10:45 pm (1 year ago)

    Both my cats have had covenia in the last few years and we have thankfully had absolutely no problems with it.

    Reply
    • Jon
      February 16, 2015 at 7:45 am (1 year ago)

      My little Peanut just got his shot a few days ago and is doing wonderfully. His leg infection is clearing up very fast and he’s doing much better. ALL drugs have rare unwanted effects but this one is great plus you don’t have to stick a pill down your cats throat every day and we know they appreciate that a lot!

      Reply
      • Ingrid
        February 16, 2015 at 7:56 am (1 year ago)

        I’m glad Peanut is not having any adverse reaction to Convenia, Jon. You are correct, all drugs have side effects. The problem with long acting drugs like Convenia is that when an animal has severe side effects, there’s very little that can be done since the drug stays in the system for up to 60 days. As long as cat guardians are informed of the potentially serious side effects of this drug prior to administration, and why a drug reaction to a long acting drug is different than a drug reaction to a drug that only stays in the system for a few hours, it’s up to each individual to determine whether they’re willing to accept that level of risk. Sadly, far too many vets fail to make cat guardians aware of these risks and/or give it without the owner’s consent.

        Reply
        • Jon
          February 18, 2015 at 6:39 pm (1 year ago)

          Peanuts doctor explained everything very well to me but I had to factor in that he will not let anyone put a pill down his throat and the last time I tried he puked it up in his litter box and buried it so I wouldn’t find it. He has very healthy liver and kidneys so I wasn’t worried about it plus his infection was so bad I did have much of a choice. I’m not a vet or scientist so I can’t really say with 100% certainty this drug is perfectly safe and for all animals but Peanut has an amazing doctor and if he recommended it I have full faith in it. I’m really sorry about all the kitties that were lost but there are tons of things it could have been instead of an antibiotic. Infection can cause the body to do strange things including causing organs to shut down.

          Reply
          • Ingrid
            February 19, 2015 at 7:11 am (1 year ago)

            I’m glad to hear that Peanut’s doctor explained the risks, Jon. Far too many vets either don’t, or don’t seem to be concerned that potential risks with a long acting drug are different than risks with drugs with a shorter half life. It will always be an individual decision for each pet guardian, and there may be some situations where the benefit is worth the potential risk.

            FWIW, the vet I’ve used for many years just changed clinics, and I followed her. She doesn’t use Convenia, but the other vet at the clinic does (and believe me, she’s doing her best to educate that vet about why it shouldn’t used in cats.) When my records were set up at the new clinic, I insisted that my records were labeled “NO CONVENIA UNDER ANY CIRCUMSTANCES.” I would be far more comfortable if the clinic didn’t use it at all, though.

          • Debbie
            March 24, 2015 at 10:19 am (1 year ago)

            My vet just said it was good for 2 wks rather than trying to give her a pill everyday. He didn’t mention any side effects. keeping a very close eye on my baby girl.

          • Ingrid
            March 24, 2015 at 10:25 am (1 year ago)

            It is good for two weeks, BUT the drug stays in the system for up to two months. Unfortunately, most vets are either not aware that this drug can have serious side effects, or, as one vet actually told me, “don’t believe” that there can be problems. You can get a good probiotic at Whole Foods or Mom’s Organic Market or your local pet store. Just look for something that has only probiotic strains and no other additives. Some products for humans mix have additional supplements added. All my best to your cat.

    • Sango
      February 18, 2015 at 11:41 pm (1 year ago)

      I am happy that Convenia worked out for you and your cat. It has helped many of my cats and it is convenient. But after one of my young cats, Yani, who had a minor skin infection died within a couple hours of the convenient injection, and in hindsight was a contributing factor to three my other cats deaths, I will never allow the use of Convenia on my cats again. The convenience of convenia is not worth the risk. I am sure now that deaths happen more often than we know, and even if it is 1 in 10,000, when it is your cat that dies it, telling me that death is a rare side effect is of absolutely no consolation.

      Reply
      • Jon
        February 19, 2015 at 7:11 am (1 year ago)

        I’m sorry about your babies. Losing a cat is not easy. In the future if you ever have to have an injection for anything for any of your kitties have them stay at the vet for a few hours to make sure they’ll be ok just in case. I couldn’t imagine my home without Peanut in it. He’s what makes it a home.

        Reply
  22. Penny Williams
    February 9, 2015 at 5:38 pm (1 year ago)

    I lost my sweet cat Piper to a Convenia shot 2 years ago Thanksgiving weekend. I had my landlord take her to a vet who was not her regular one because she was walking as though she were in pain, and as our vet had earlier ruled out an infection, I was not thinking in those terms and did not tell him to warn the vet not to give her Convenia. They found and abcess in her elbow and gave her a shot. She did not display immediate symptoms, but a couple of weeks later, she went into respiratory distress and X-rays showed pulmonary edema in an advanced stage. The vet said she’d been building it up for a while (like two weeks). Several hundred dollars and a stay at the emergency vet in the next state got her dried out, but it went too far and she became severely dehydrated. By the time I got her back to a local vet, her blood was so thick they couldn’t get any. Her heart failed when they started giving her fluids, and she died. Yes, pulmonary edema is one of the known side effects of Convenia.

    Reply
    • Ingrid
      February 9, 2015 at 5:51 pm (1 year ago)

      I’m so sorry, Penny.

      Reply
    • EvaServal
      February 9, 2015 at 6:38 pm (1 year ago)

      So very sorry Penny…

      Reply
  23. Connie West
    February 9, 2015 at 4:49 pm (1 year ago)

    i believe Convenia killed one of my strays. i was not told about side effects. he went downhill right after the shot. my new vet is AAHA accredited and when i asked to please put “no Convenia” on all of my cats charts he told me not to worry, that that drug was not even in the building

    Reply
    • Ingrid
      February 9, 2015 at 5:27 pm (1 year ago)

      I’m sorry about your stray, Connie. I like that your new vet isn’t even carrying Convenia.

      Reply
      • EvaServal
        February 9, 2015 at 6:38 pm (1 year ago)

        I’m so sorry about your stray Connie… I fear we are going to see more and more on this thread…

        Reply
  24. EvaServal
    February 3, 2015 at 1:58 pm (1 year ago)

    So very sorry about Yani, Dave. I don’t believe at all that this is rare. My dog and several others (cats) reported here can’t be the only ones. I’d love to know what you find out. It’s heart breaking and I’m so very sorry for your loss.
    Eva

    Reply
    • Dave
      February 5, 2015 at 1:29 pm (1 year ago)

      Thank you, EvaServal, for your sentiments. Since Yani’s death, my vets have been warning their clients about Convenia, and they are saying that no one that gets the warning wants the injection for their pets now. I have asked my vets to please spread the word at DVM conferences and conventions and they are already letting all their DVM friends know, at least word is out in Ohio now, where I live. I have decided that I will request the info under the freedom of information act from the FDA. I won’t get around to it until next week. Dave

      Reply
      • Ingrid
        February 5, 2015 at 2:13 pm (1 year ago)

        I’m so glad to hear that your vets are taking this seriously, and that they are spreading the word, Dave. I know it won’t bring Yani back, but perhaps there’ll be some comfort in knowing that other cat guardians will now be warned about Convenia.

        Reply
      • EvaServal
        February 5, 2015 at 4:44 pm (1 year ago)

        Oh that is such good news! It’s baby steps and I pray this killer Covenia is off the market soon!

        Reply
  25. Dave Cornett
    February 2, 2015 at 8:22 pm (1 year ago)

    ps .The ’41’ at the end of my comment was typed by one of my other cats just was I went to post it.

    Reply
  26. Dave Cornett
    February 2, 2015 at 8:18 pm (1 year ago)

    I have a cat rescue and have had several cats treated with Convenia, but the other day (1/29/2015) I took my cat, Yani, to the vet because he had an abscess from a cat bite. Yani was five years old and very healthy. The vet cleaned the wound and gave him a Convenia shot.

    She sent me home with Yani telling me he would be just fine. When we got home I let him out of the carrier and left him alone. I figured he needed some rest. When I checked on him a few hours later, he was dead and already well into rigor mortis. I was beside myself with grief!

    I went straight away to my Vet. She checked the paper that comes with Convenia and showed me that death was listed as a possible reaction! She was shocked. She had not done her due diligence and not realized herself the danger and had certainly not informed me. Yani was easy to handle and I could have easily given him an oral antibiotic.

    This experience has made me wonder if a couple of my cats who were quite ill might not have died also because of the Convenia, whereas I thought it was because of the illness. My vet and I both reported to Zoetis. Their Vet said that death does happen, but it is rare. I think it is happening a lot more often than they are letting onto. I felt I was given the run around. I suspect they are not forwarding the ADEs to the FDA. They wouldn’t tell me how many reports have been made. I have also filed a report with the FDA and will encourage my Vet to do the same.

    To find out how many reports have been made, I would have to make a request under the Freedom of Information Act, which has a cost. I don’t know how much, but am considering it. 41

    Reply
    • Ingrid
      February 3, 2015 at 7:00 am (1 year ago)

      I’m so sorry about Yani, Dave. Your story, and the stories of so many others who have left comments on this post, make me think that reactions to Convenia are not all that rare. If you decide to pursue getting the information about the number of cases that have been reported, please keep us posted on what you find.

      Reply
    • Michelle
      February 17, 2015 at 6:45 pm (1 year ago)

      Our cat was given Convenia for a suspected urinary tract infection before culture results and was deathly ill within 48 hrs and died of liver failure on day 8.
      My vet says Zoetis says that not one single cat has ever been reported to have died from Convenia. Really?!?

      Reply
      • Ingrid
        February 18, 2015 at 7:17 am (1 year ago)

        I’m so sorry about your cat, Michelle. I find Zoetis’ response to your vet extremely disturbing.

        Reply
  27. EvaServal
    January 5, 2015 at 12:40 am (1 year ago)

    Frank,
    My sincere condolences… I wish they’d take this product off the market.
    I wish you comfort and peace in these times.
    Sincerely
    Eva

    Reply
  28. Debi
    January 3, 2015 at 2:30 pm (1 year ago)

    So sad and frustrating that this keeps happening and the drug is still being given. It’s been almost 2 years now that I lost my precious Cholla to this horrible drug. Both my vet and I reported it to the FDA and Zoetis. Still not even a warning is given to cat guardians of the danger. It must be extremely profitable. How anyone is comfortable profiting from the terrible death these sweet fur babies must endure after a Convenia shot is beyond my comprehension.

    Reply
  29. Frank
    January 2, 2015 at 9:35 pm (1 year ago)

    I took our cat Zeus in the day after Christmas because he was having intermittent episodes of vomiting and although he was eating normally it looked as though he was still losing weight. We thought he may have some kind of intestinal parasite but all in all he was in good health. The vet said they wanted to do a blood test and give him some intravenous fluids as they felt he was a bit dehydrated. They also made a passing comment that they wanted to give him an antibiotic as a precautionary step in case he had an infection. The antibiotic they gave him was Convenia. As soon as we got him in the truck to take him home, he immediately started to vomit. We didn’t think much of it as that is why we took him to the vet in the first place. Later that evening he was very antisocial which is unusual for Zeus, but thought he was mad because we took him to the vet, you know how cats are! Over the weekend we notice he was very lethargic and didn’t want anything to do with anyone in the house, even our son who he absolutely adored couldn’t hold him as he wanted to just get away from everyone. To make a long story short, he soon stopped eating and looked like a person who was on drugs and didn’t know where he was. The following Monday, 3 days after his vet visit, I noticed he kept getting up and laying down in different positions as if he was uncomfortable. The following morning we found him hiding under the Christmas tree and meowing in a very pathetic way. He would not eat and just laid in the same place for hours at a time. Later that afternoon I took him back to the vet and told them that whatever they did to him, he was definitely not himself. I was told that he was having kidney failure and they would need to give him an IV overnight. Well, he didn’t even make it through the night! They called early the next morning and said that he had passed away. The only thing I could attribute this sudden death to was the antibiotic shot he received and within 5 minutes of doing a search on the internet I found several posts such as this from Ingrid and quickly realized that our cat suffered the same fate as other cats that had received injections of Convenia. Please, if your vet says they want to give your cat or dog an antibiotic, make sure it is NOT Convenia! I am convinced that this is what killed our cat.

    Reply
    • Ingrid
      January 3, 2015 at 7:15 am (1 year ago)

      I am so sorry, Frank. Please make sure that you and/or your vet report what happened to Zeus to the FDA and to Zoetis, the maker of Convenia.

      Reply
  30. R A Sullivan
    December 12, 2014 at 7:38 pm (1 year ago)

    We have a 14 y.o. Tuxedo cat who has epilepsy. She has been successfully treated with phenobarbital for several years, with NO breakthrough seizures. we have routine blood analysis to check kidney and liver function.
    Recently she had a large abscess on her chin. The vet suggested Convenia to my husband because of the convenience of its dosing. Never were we told that it remains in the tissue for more than 60 days. Our cat has had two seizures in one week, one a massive event over 3 minutes long. Neither vet had any information regarding the concurrent use of anti-convulsants with Convenia. I have provided them that information copying it directly from a professional website. Seizure are a serious side effect. I am not a blame placer , but a problem solver. I suggest anyone who has had this happen to them to report it immediately to the Convenia website. We will never allow the use of Convenia with out cats.

    Reply
    • Ingrid
      December 13, 2014 at 7:03 am (1 year ago)

      I’m sorry this happened to you. Please report this to the FDA as well. All my best to your kitty for a complete recovery.

      Reply
      • EvaServal
        January 5, 2015 at 12:32 am (1 year ago)

        R.A. Sullivan, I’m so ver sorry about your sweet cat… my condolences.
        Hugs

        Reply
      • EvaServal
        January 5, 2015 at 12:35 am (1 year ago)

        Frank,
        My sincere condolences. All these incidents are horrible and unnecessary. I don’t understand why this product is still on the market. (money is why)
        Again, I’m so very sorry for your loss… I pray you get comfort in these times.
        Sincerely,
        Eva

        Reply
  31. EvaServal
    December 8, 2014 at 1:08 pm (1 year ago)

    Terry, I’m so very sorry… heart breaking… 🙁

    Reply
  32. terry parolini
    December 8, 2014 at 8:15 am (1 year ago)

    we adopted a kitten Lili, from a humane society, she came with the normal humane society issues, upper respiratory, weeping eye. I brought her home on Sept 11, 2014. She had been spayed. Lili was so tiny 1.5lb, I thought she was 6-7 weeks old. We returned home and I was reviewing her paperwork and discovered she was close to 12 weeks old. She was very active fit right in with our other cat and 110lb dog. She acted like a typical “crazy” kitten, she loved being cuddled and would curl up under my neck to nap. I wanted her checked out by our own vet. I brought her in the next day Sept 12th, he agreed she had an upper respiratory infection and that she was very small for her age but healthy. He suggested the convenia shot, I agreed. I did ask about side effects and what to watch for, he did say she could be tired for a day or 2, she was. A month plus, Lili started to sneeze, green “snot” started to appear around her nose so we brought her in again. On November 3rd they gave her a second shot of convenia. She started to go down hill immediately. She would just sleep, no more playing she didn’t even care to cuddle. We brought her in on November 26th and they placed her on a second oral antibiotic after conducting testing for Feline Lukkemia and other feline issues. I told the vet that I think it was the shot, because she went downhill right after that second shot. Lili could hardly walk, when she did she would stagger and fall over. She began to pee and poop where she was sleeping. I purchased a baby animal milk formula thinking it would be like “ensure” I would give her water with a syring to make sure she was getting some water. She would stagger to the water and food bowls but ate very little. We brought her to the vets to board her as my husband was going to Mayo for cancer surgery and we couldn’t leave her home with the person watching our other pets, we realized Lili needed extra attention. This was on Dec 2nd, 6 days after her last visit……they recommended that we put her down, her temp was 10 deg below norm, her kidneys were failing. I was sick. I told the vet that I read up on the shot convenia and believe this is was the start of her failings, I said I am not blaming anyone but feel I should have been told the side effects not just that it is an antibiotic and is used all of the time without problems…..they don’t know that…..people may not make the connection with their sick pet getting sicker after the shot and just think it’s the illness. I know in my heart that shot was what started Lili’s downslide and eventually forced me to make that heartbreaking decision, euthanizing her. In less than 3 months I spent over $500.oo to kill my poor little kitten.

    Reply
    • Ingrid
      December 8, 2014 at 8:45 am (1 year ago)

      Oh Terry, I’m so sorry about Lili. My heart goes out to you.

      Reply
    • Lesley Le Page
      December 9, 2014 at 4:58 am (1 year ago)

      Terry, I absolutely feel for you and your poor little kitty. Convenia successfully killed two of my cats. The first one was ill with breathing difficulties, took her to the vet, Convenia was administered and immediately she began staggering when I tried to put her back in the cat carrier. She improved after about a week, but then suddenly disappeared. We found her later – she had died alone, in the wet and cold. I insisted that our vet put a report into the manufacturers, Pfizer. I left instructions with the vet to put on their system that Convenia should never be used on any of our cats or dogs in the future. When another of our cats became poorly, my daughter took her to the vet. They gave her Convenia! She died the next day in my arms. THIS DRUG SHOULD BE TAKEN OFF THE MARKET AND PFIZER SHOULD BE SUED!

      Reply
    • Vicki
      December 9, 2014 at 12:12 pm (1 year ago)

      Terry please file a report with Zoetis (the manufacturer) and FDA – see Dr. Pierson’s article for contact info).

      My Leo died back in July from Convenia. We had a necropsy performed and I spoke with both of these organizations. The FDA said that only about 1% of people actually follow through with a report and they must have significant amount of data before anything can be done. She thanked me for calling. Please ask your vet to send in a report as well.

      I’m so sorry about Lili…it is heartbreaking.

      Reply
      • Michelle
        February 17, 2015 at 6:49 pm (1 year ago)

        Dear Vicki-
        Could you share the results of your necropsy?
        My Vet informed me today that Zoetis told him that not one single cat has ever died from Convenia use.
        Also, that the drug is processed through the kidneys, not the liver, so sudden and accute liver failure after Convenia is not related to the drug.
        Appreciate your advice.
        Michelle

        Reply
        • Vicki
          February 18, 2015 at 5:54 pm (1 year ago)

          I can email you his report…what they are saying is that science never recognizes anything as absolute; so there is no way that they can prove that Convenia was the reason for his death.
          I will say that when my vet called and told Zoetis what happened they offered immediately to pay for the necropsy that we had had done. She didn’t ask them too (I had already paid the vet) they offered.
          FDA will do something only when there is enough data to “suggest” that there is an issue. That is why more people need to have the necropsy performed and sent in. It’s a horrific experience but I had hoped that it would help. I was disheartened when FDA told me that there isn’t enough data for them to act.
          Zoetis will never admit that their drug caused a death…I would hope that your vet would know that. Have him/her read the caution label for adverse effects and check the European warnings…they apparently have enough data for them to believe that there is an issue.
          if you want to contact me please do so via info@halfthewayhome.org

          Reply
          • EvaServal
            February 18, 2015 at 6:39 pm (1 year ago)

            I wished there was a “like” button for your comment, Vicki

  33. EvaServal
    September 15, 2014 at 12:45 am (2 years ago)

    Hi Saguil,
    Keeping you and your kitty in my prayers. Please do get your kitty on the probiotics that Catlady is recommending…
    All the best.
    Eva

    Reply

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