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Methimazole is used to treat Feline Hyperthyroidism, a condition that occurs when the thyroid gland produces too much thyroid hormone.
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Item# Size/Desc Qty Price
5 mg Tablet
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5 mg Tablets, 100 cnt bottle
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10 mg Tablet
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10 mg Tablets, 100 cnt bottle
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This item requires a RX

**Note: This product requires a veterinarian's prescription to purchase.At checkout you will need to provide your veterinarian's FAX or email address. We will then send him or her a prescription verification that he or she will need to sign and return before we can ship you this product.


*  Effectively treats hyperthyroidism in cats
*  Lower incidence of adverse side effects than Propylthiouracil
*  Rapid results
*  Affordably sold per tablet


*  It is important to give this mediction exactly as directed by your veterinarian.
*  Do not give in larger amounts, or give it for longer than recommended by your veterinarian. 
*  Methimazole can be given with or without food.
*  Allow plenty of water for the pet to drink. 
*  Do not use in pregnant or nursing animals.
*  This product is not FDA approved for use by Veterinarians but is a commonly prescribed medication for cats
*  Periodic blood tests will be necessary while the cat is taking this medication

Dosage for cats of all weights:

The usual initial dose varies from 2.5-5mg 2 or 3 times a day. Periodic blood testing is required to monitor liver function and for any toxic effects on blood cells
This medication is not for use in Dogs and Horses.


* Do not use in pregnant or nursing animals

* Do not give your pet a live vaccine while giving methimazole

* Methimazole can increase the risk of bleeding.

* Methimazole can lower the blood cells that help fight infections.

* Do not stop giving this medication to your pet, if the medication is stopped, the symptoms will reappear and result in life threatening symptoms

* Tell your veterinarian if your pet has an allergy to methimazole or if your pet has liver disease, a blood cell disorder, or a weak immune system.

* Tell your veterinarian if the pet is pregnant or nursing.

* Inform your veterinarian of any other medications, including vitamins and supplements your pet may be taking while receiving methimazole. Tell your veterinarian if your pet is taking theophylline Theo-Dur, warfarin Coumadin, digoxin Lanoxin, a beta blocker such as atenolol Tenormin, metoprolol Lopressor, or propranolol Inderal. Drugs other than those listed may also interact with Methimazole. Talk to your veterinarian or pharmacist before giving any prescription or over the counter medicines.

Possible Side Effects:

If any of the following serious side effects occur, stop giving methimazole and seek emergency veterinary medical attention
* an allergic reaction difficulty breathing swelling of the lips tongue or face hives.

* Stop giving methimazole and contact your veterinarian at once if your pet develops any of these serious side effects fever, chills, body aches easy bruising or bleeding, unusual weakness blood in the urine or stools severe blistering, peeling, and skin rash nausea, low fever, loss of appetite, dark urine, jaundice.

* Other less serious side effects may occur. Continue giving methimazole and talk to your veterinarian if your pet experiences headache, drowsiness, dizziness mild nausea, or vomiting itching muscle, joint, or nerve pain swelling hair loss.

* Other side effects may also occur. Talk to your veterinarian about any side effect that seems unusual or bothersome to the animal.