At a Glance
Effective in fighting hyperthyroidism, or Graves disease
Reduces overall thyroid hormone levels
Comes in tablet form and taken orally
Our regular price:
This item is on sale!
- Wholesale prices on Flea & Tick, Heartworm, Supplements, & Rx Food
- Wholesale prices on all Prescription Medication
- Free shipping on all PetPlus items
- 20% off all other products on PetCareRx.com
- 24/7 Vet Helpline - Call, Email, Chat
- 100% Member Savings Guarantee
- Only $50/year (per pet, plus tax)That's UNDER $5 per month!
Learn More »
Methimazole is an anti-thyroid tablet administered for the treatment of hyperthyroidism in cats. Hyperthyroidism, often known as Graves disease, is an autoimmune disease that causes hyperactivity within the thyroid gland leading to the overproduction of the thyroid hormones thyroxine (T4) and triiodothyronine (T3). Metehimazole is the generic of Tapazole.
Hyperthyroidism is a condition that may lead to weight loss, abnormal appetite, and heart issues. In this instance, the medication works by restoring the thyroid hormone levels back to normal by interfering with iodine, which plays a major role in thyroid performance. Overall, Methimazole has been proven incredibly effective against Graves disease in cat's.
Side Effects and Warnings
Side effects occur in less than 5% of all cases, but can be serious, such as a decreased white blood cell count (agranulocytosis); contact a veterinarian immediately if your pet display signs of a sore throat. Excessive bleeding can also occur as a result of a decrease in blood platelets. Very rarely, liver failure and its ensuing complications have been associated with Methimazole.
More common side effects are skin-related, including rash, itching, hives, abnormal hair loss, and skin pigmentation. Other side effects may include swelling, nausea, vomiting, heartburn, loss of taste, joint or muscle aches, drowsiness, dizziness, numbness, and headache. Do not use in pregnant or nursing animals.
Do not take with theophylline (Theo-Dur), warfarin (Coumadin), digoxin (Lanoxin), a beta blocker such as atenolol (Tenormin), metoprolol (Lopressor), or propranolol (Inderal). Talk to your vet before starting any serious treatment plan.
Ask your veterinarian or consult with one of our pet care specialists at 1-800-844-1427.
This information is for informational purposes only and is not meant as a substitute for the professional advice of, or diagnosis or treatment by, your veterinarian. Always seek the advice of your veterinarian or other qualified professional with any questions you may have regarding a medical condition. Never disregard or delay seeking professional advice due to what you may have read on our website. Our medications are FDA approved and/or EPA regulated when and as required by law.
5mg per tablet
10mg per tablet
Store methimazole at room temperature, between 68 and 77° F (20 and 25° C). Brief storage at temperatures between 59 and 86° F (15 and 30° C) is permitted. Store away from heat, moisture, and light. Do not store in the bathroom.
Methimazole comes as an oral tablet. Be sure to administer medication with food and water two to three times a day (or every eight hours). A blood test will be conducted by your veterinarian to determine proper dosage levels. Do not use in pregnant or nursing animals
Rated 4.4 out of 5 by 21
Rated 5 out of 5 by whatever works for hyperthyroidism
my cat has gained weight since taking methimazole. i've had hyperthyroid cats in the past who had been on it and it definitely helps with that issue.
October 13, 2015
Rated 5 out of 5 by JuliaFinalea Worth it!
All I have to say is I'm pleased with its effectiveness AND ease of splitting. I've had different brands where they could barely be cut properly! (My cat was on 1/8 tab two times a day at one point, then moved to 1/4 tab twice a day) So, yes, I am very pleased with this medicine!
August 25, 2015
Rated 5 out of 5 by mrtedders Seems to work well.
Works for my cat's condition. His hyperthyroidism is under control. I will definitely re-order from PetCareRX.
April 10, 2014
Rated 5 out of 5 by zackdad prompt delivery, excellent value
hassle free! they contact the vet directly and ship promptly. the product appears to be of high-quality and effective. very satisfied
February 6, 2014
Rated 5 out of 5 by sammy12 It works!
I have a cat that was diagnosed with hyperthyroidism and the vet prescribed this medicine and it has definitely lowered her levels.
January 16, 2014
Rated 4 out of 5 by Frethtx Not same as received from vet. They were larger & chicken flavored
Tiny tablets. Difficult to split. Not flavored. Prompt delivery.
September 16, 2013
Rated 2 out of 5 by sherri32 Not as effective as brand for my kitty
When my cat had a mild problem with his thyroid, this was fine, for a few years actually, but then when it started to get worse I tried Tapazole name brand and within days he was tested again and the numbers dropped 5 points (not sure what the medical term is) to within normal range. The vet had previously tried another generic he uses in his office which usually works well, for 2 weeks, and still no change. So, as it turns out, in this case, sometimes the generic of this type of medicine just isn't as effective. If you must use it, please get your pet tested more often. I have insurance which covers most of my cost, and therefore have switched to the name brand this time.
March 24, 2013
Rated 5 out of 5 Cheap and effective
A lot cheaper then what the vet charges and it works great! My cat has been on it over a year and after a month she gained her weight back and she's been doing great ever since. Thanks to Pet-rx. Fast shipping too.
September 20, 2012
Methimazole, generic of Tapazole, is an anti-thyroid pill used to treat hyperthyroidism in cats to restore the hormone levels back to normal. Methimazole comes in tablet form to be taken orally and can be prescribed by your cat's veterinarian.
In stock! Order now!
based on 21
As a Complete Care Plan member, enjoy the following benefits:
- All of your pet prescriptions at wholesale pricing
- Save 25% every time you go to the vet (through PetAssure)
- Convenient pickup at over 60,000 local pharmacies, including CVS, Target, Walgreens, and Walmart
- 20% off everything at PetCareRx.com
- $50 off your first dog sitter booking with Rover.com
- Guaranteed savings in your first year as a member
- And much more...
All this for only $9.99/month
Would you like to upgrade?
Add at Regular Price