Methimazole Prescriptions for Small Animals & Other Pets | Petco

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Vet Q & A
Is it safe to pre-prepare cat methimazole doses using butter?
I think I know what you're asking - you're asking if you can put together multiple doses of methimazole in separate aliquots of butter, correct? According to Plumb's veterinary handbook, methimazole is supposed to be stored in a closed container, away from light and at room temperature. So I think it would probably not be a good idea to prepare your butter + methimazole "doses" ahead of time, since the butter would need to stay in the refrigerator to stay solid. If it's hard to medicate your cat, you might investigate having your vet order a compounded flavored oral suspension of methimazole. This is usually quite easy to give, and compounding pharmacies can make meds with virtually any flavor added, so pets will take them.
Updated on September 24th, 2025
Health & Wellness
My cat's hyperthyroidism: Methimazole side effects. What to do?
Luv Bug is so very fortunate to have you as an owner. I am sure that you are one of the main reasons that she is going strong at 17 years of age. Kudos to you for your consideration and compassion for your pet. In terms of hyperthyroidism in cats, there are only three real treatments on the market today. These are methimazole treatment, thyroidectomy surgery, and radioactive iodine treatment. It is believed in the veterinary community that radioactive iodine is the gold standard treatment today. With the information you have provided, I can offer you a few possibilities for future treatment: 1. Perhaps you can get the math him is all in a tablet form to crush it into a fine powder and then mix it with any palatable substance that she likes and then squirt it in her mouth with a syringe. This, however, may cause some behavior problems because she may not like this either. 2. If you are willing to accept the costs and all of the different parts that go with the radioactive iodine treatment, I say go for it because the success rate for that specific treatment is excellent. Thank you very much for your question and I know you will make the right decision on her behalf. Have a great day.
Updated on September 24th, 2025
Health & Wellness
My cat on methimazole has side effects. Are they an emergency?
These signs could be consistent with methimazole related side effects. GI upset and facial itching are some of the most common acute side effects in the first few months of therapy. I would recommend stopping the medication until you can talk to your vet about your concerns. Some cats can not take this medication and thus require an alternate method of treatment. If still eating and drinking that is good. If any of the symptoms worsen an ER visit is advised. I hope this helps and thank you for using Petco Pet Education Center, formerly Petcoach!
Updated on September 24th, 2025
Vet Q & A
Can my hyperthyroid cat take methimazole once a day while I'm away?
Hi, thanks fir using Petco Pet Education Center, formerly Petcoach! Madeline is super cute! Yes, that is absolutely fine to have the pet sitter give methimazole once daily (double the single dose to equal her twice a day dose) while you are away! Have a great weekend!
Updated on September 24th, 2025
Health & Wellness
My cat takes Felimazole twice daily. Can I give it once a day?
Hello. Felamizole generally stays in the system for 12 hours, but it is not uncommon to increase the dose when an owner will be away temporarily. It is best to start the 5mg once a day several days before you leave to see if you notice any difference in Mia, but I have recommended this in the past. Resume the twice daily 2.5 mg dose once you get home. Thanks for using Petco Pet Education Center, formerly Petcoach.
Updated on September 24th, 2025