Felimazole (methimazole) Tablets for Cats

By Felimazole
Rated 4.6981 out of 5 stars
Prescription Item


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$0.18Chewy Price
$0.17Autoship Price
(Save an extra 5%)

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In Stock
FREE delivery over $35
Usually arrives in 3-5 days
We'll collect your pet's prescription information at Checkout.

This item requires prescription approval.

Medications ship separately. Delivery times may vary.

Frequently Bought Together

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Total Price: $26.65

About This Item


Felimazole treats feline hyperthyroidism, a commonly diagnosed disease in senior cats. The disease results in excess levels of thyroid hormone being produced in the thyroid gland. Symptoms can include weight loss, increased thirst and urination, vomiting, and excess activity.

Proudly sourced directly from the manufacturer or their approved distributor. Guaranteed genuine and backed by the manufacturer.

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Play Video: Learn More About Felimazole From Our Team of Experts
Learn More About Felimazole From Our Team of Experts

ReviewsWrite a Review

Rated 4.6981 out of 5 stars
106 Ratings
Would recommend to a friend

105 Customer Reviews

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.
Rated 5 out of 5 stars
By Melissa on Sep 7, 2023

Easy to administer

This pill is tiny and coated. I put it in my cat's wet food twice a day and he gobbles it right up. He has been on it 3 weeks and is already feeling much better. If your cat likes canned food, this is the easiest way to administer the medication. I initially tried the transdermal meds given in the ear. He didn't mind having it rubbed in his ear at first but after a week started running off whenever he heard the applicator click to get the medication to come out. Giving it in his food is much less hassle.

Rated 2 out of 5 stars
By Charlie on Jul 27, 2023

.375 mg Option Please

First, this medicine works, but the manufacturer really needs to make lower dose tablets. I have to cut the tablets into quarters. We had to increase the dosage by adding another quarter pill of 2.5 mg in the morning which is .375 mg. So our cats get 3/4 tablet in the morning and 1/2 tablet at night before bed. A quarter tab extra in the morning was enough to decrease our cat's T4 from 3.0 to 1.4. The tablets are coated and not meant to be cut. Cutting them in half is difficult enough. Cutting them into quarters is extremely tricky. My vet says it's widely accepted that Felimazole is optimal given twice daily instead of once daily as described in the insert. The tablets are coated and not meant to be cut into smaller doses and yet it's very commonly prescribed at much smaller doses. Please offer smaller doses. I see you offer a 1.25 mg tablet in Canada. At least offer that in the U.S. as well.

Rated 5 out of 5 stars
By Cindy on Sep 13, 2023

Cat sick from hyperthyroidism

This seems to be working very good, the vet gave her some but they didn't have a coating to help coat her stomach and she was getting very sick and now these coated ones seem to be working so far so good.

Rated 2 out of 5 stars
By Marmar50 on Aug 18, 2023

Thyroid medication

Unfortunately these pills did not work for me as I have to cut them in half and the hard coating and tiny size make that next to impossible so I went back to the generic ones But I love Chewy anyway

Rated 5 out of 5 stars
By James on Jun 15, 2023

Excellent Product

This is an excellent formulation of a bitter medication for cats. Be advised, however, that the sugar coating dissolves away very quickly. If you are hiding the pill in food, do so immediately before feeding and make sure it is just barely hidden so your cat will eat it early on. Unfortunately, my cat developed bad side effects from methimazole after a couple of weeks and now refuses to take the pill form no matter how well hidden they are. That is no slight on this product, it is just the nature of the medication involved.

Rated 5 out of 5 stars
By Bubba on Jun 11, 2023

You folks are the best. I had two different customer service reps that were extremely helpful. They did what was needed and made it happen. And they spoke English!! I called recently to inquire about Nutrena Cat and Kitten. The rep did some checking and said it looked like you would be bringing in that line. As soon as you get it you will have all my cat food business. Many thanks, Hollis

Rated 3 out of 5 stars
By Ts on Jul 10, 2023

Probably not again

I thought I was purchasing Two bottles of the product pictured. What I got was one blue bottle of pills. I don't know if these are old, outdated or what, since they did not come in the manufactured bottle.

Rated 5 out of 5 stars
By Shldibuyit on Jul 12, 2023

Life saver

I bought these pills to help my cat survive her hyperthyroidism. They are easy to give to her and she easily swallows them. That makes helping her live a better life is effortless. Well worth it!

Rated 5 out of 5 stars
By LeosMom on Jul 2, 2023


This product has done wonders for my 16 yr. old cat that has hypothyroidism. I have had no problem getting him to take the pill and he has quit howling. I will see how much improvement it's made on his next Vet appt.

Rated 5 out of 5 stars
By nancy on Jul 13, 2023
Top 250 Contributor

Has to have it

This is prescribed by my vet, but it is so much more reasonable from chewy. Thank you thank you. Thank you. now please carry metronidazole for another cat.