Felimazole (methimazole) Tablets for Cats, 2.5-mg, 100 tablets

Have a Chewy account?
Sign in to quickly add pet health details.
Skip image gallery
Slide 1 of 5

$12.85 First Time Autoship Price
this order
Save 35% (up to $20) today when you set up Autoship. 
$18.78 Autoship Price
(-5%) future orders
  • Keep saving 5% on every order
  • Never miss a dose with easy refills
  • Skip, change, or cancel anytime
$19.77 Chewy Price
($0.19 /ea)
Save $0.23 (-1%)
$20.00 List Price
Promo, Save 20% on first Rx order with code RX20
Promo, New Customers Only: Spend $49+, Get $20 eGift Card + Free Shipping with code: WELCOME
In Stock
FREE delivery on first-time orders over $35
Usually arrives in 3-5 days
Prescription approval made easy
We’ll reach out to your vet clinic.

No interest if paid in full in 6 months on PayPal purchases of $149+. .

Medications ship separately. Delivery times may vary.

About This Item

Details

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.We directly source prescription medications from manufacturers and wholesale distributors registered with the FDA and licensed by applicable state boards. Guaranteed genuine, and where applicable, backed by the manufacturer.

Ingredients

Instructions

FAQ

Learn More About Felimazole From Our Team of Experts

Frequently bought together

Reviews
Write a Review
4.8
Rated 4.8 out of 5 stars
1731 Ratings
Terms & Conditions

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Ease of Use

88% Positive

Effectiveness

87% Positive

Ingredients

87% Positive

Long-Term Benefits

88% Positive

641 Customer Reviews

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.

Rated 2 out of 5 stars
By Morgan on Jan 13, 2026

It works, but you'll be the one to pay when Fedex loses your meds

The medications works exactly as it should for cats with thyroid issues; it stopped our cat's inappropriate urination. The problem I have faced over and over,

The medications works exactly as it should for cats with thyroid issues; it stopped our cat's inappropriate urination. The problem I have faced over and over, and will now likely cause me to go back to physical prescription pickup, is that when Fedex loses your pet's medication (and they definitely will - it happens once or twice a year for me), Chewy will replace it for free, but it will eat another month's worth of refills to do it. This is my only single complaint about all of Chewy, but I cannot continue to be punished for Fedex's poor service.

Rated 5 out of 5 stars
By Linda on Dec 24, 2025

Works fast for hyperthyroid

My cat was 16 lbs (not fat, just a big boy) and got down to 10 lbs. After bloodwork determined he was hyperthyroid I started him on this medicine and within two

My cat was 16 lbs (not fat, just a big boy) and got down to 10 lbs. After bloodwork determined he was hyperthyroid I started him on this medicine and within two weeks has started to put some weight back on. Of course I bought Pill Pockets and give him an empty one, then give him the one with the pill in it and then some wet food as a treat. He knows he has to eat both Pill Pockets first to get his canned food.

Rated 5 out of 5 stars
By ALISA on Jan 15, 2026

Your staff was so so respectful

It was ridiculous how difficult it was for me to figure out how many tablets my cat needs in a day (it is not a whole number). I have a recent brain injury and

It was ridiculous how difficult it was for me to figure out how many tablets my cat needs in a day (it is not a whole number). I have a recent brain injury and doing math is an area still affected. It was so embarrassing to me and the staff was so very very kind and helpful when I called

Rated 5 out of 5 stars
By Eileen on Dec 5, 2025

Incredibly helpful staff

The item isn't amazing, it's basic medication. What is amazing is your staff. The order got gummed up due to the delivery service. The delivery was delayed, and

The item isn't amazing, it's basic medication. What is amazing is your staff. The order got gummed up due to the delivery service. The delivery was delayed, and I was leaving town with the cat on vacation. I called to see if the order could be cancelled, reordered and sent to where was going. The pharmacist ended up with my call. She blew my mind, honestly. She called the delivery service and rerouted the medicine to Texas instead of North Carolina and there were no gaps in care for my cat. I REALLY appreciated her and the help she provided. You guys are the best, thanks so much.

Rated 5 out of 5 stars
By Jaimie on Dec 12, 2025

Affordability and accessibility

My cat has been on this since summer time. She’s gained weight. Previously she was about 5 lbs and now she’s about 6lbs. We feed it to her inside a pill pockets

My cat has been on this since summer time. She’s gained weight. Previously she was about 5 lbs and now she’s about 6lbs. We feed it to her inside a pill pockets or pushed inside a soft whiskies treat. If you do the soft treat method, be aware if your cat is clever too, they will eat around the medicine to get the soft treat. So we give her the treat with & without the medicine, just so she’s not expecting it and eagerly eats it without a fuss.

Rated 5 out of 5 stars
By Sylvia on Nov 20, 2025
Top 1000 Contibutor

I think it works

We have been pilling the cat with this fairly successfully most days. I definitely know when she did not get her pill for one reason or another (the latest reason

We have been pilling the cat with this fairly successfully most days. I definitely know when she did not get her pill for one reason or another (the latest reason being the Chewy rep who cancelled the order nilly-willy because she did not know how to make the change to an autoship and we had no meds for 4 days). Nothing life-threatening, so today we got the pills we should have had. The cat probably enjoyed having her meals without having a pill shoved down her gullet. All it well.

Rated 5 out of 5 stars
By Alice on Nov 19, 2025

Made to make easy to give to cats

I love how tiny this pill is. I just put some churu on it and give it to my cat and he'll accidentally lick it up. On top of that, cause it's so small he doesn't

I love how tiny this pill is. I just put some churu on it and give it to my cat and he'll accidentally lick it up. On top of that, cause it's so small he doesn't bother spitting it out, he's too busy greedily getting churus he just swallows it. It is very tiny but the hot pink color makes it easy to find if it falls out. Usually I just put a hand underneath his chin when giving it to him (and sometimes he'll go and lick it off the hand trying to get all the churu).

Rated 5 out of 5 stars
By Diane on Oct 25, 2025

Worth the price difference for the coating.

This tablet makes pill time so easy. Not usually a fan of coloring, the fact that they are hot pink makes them easy to see when they don’t make it into kitty’s mouth

This tablet makes pill time so easy. Not usually a fan of coloring, the fact that they are hot pink makes them easy to see when they don’t make it into kitty’s mouth or go flying across the floor on occasion. They slide easily down her throat and I can literally open her mouth, tilt her head back and drop the tablet in and she swallows and it goes down easily. Of course I give her a dental chew treat afterwards just to make sure it goes all the way down. I use these twice a day for Adelaide and whatever the price difference is compared to the uncoated tabs, it is totally worth it for the ease of using these pills. They would not be good for splitting. I would think they would slide out of the pill cutter due to their roundness and hard & slick coated shell; they would probably split into fragments, but I have never tried to split them myself.

Rated 4 out of 5 stars
By Kim on Jan 3, 2026

Very effective

I love that it is a small pill - I can easily grind it up into his food. the only downside is that hard tiny pill can easily disappear and I have no idea if it made

I love that it is a small pill - I can easily grind it up into his food. the only downside is that hard tiny pill can easily disappear and I have no idea if it made it into the cat or not.

Rated 5 out of 5 stars
By Caleana on Dec 13, 2025

Coated, easy to administer

My poor cat was hiding at pill time because the uncoated tablets stuck to wherever in his mouth they touched first. These coated tablets slide right down and are

My poor cat was hiding at pill time because the uncoated tablets stuck to wherever in his mouth they touched first. These coated tablets slide right down and are so much less stressful to administer! And, they are affordable!