Price Comparisons for methimazole



Methimazole is used to treat hyperthyroidism in cats. It has largely replaced propylthiouracil in this treatment process since it has a lower incidence of adverse side effects.

For: Cats


How it works: Hyperthyroidism is a condition that occurs when the thyroid gland produces too much thyroid hormone. Methimazole inhibits the production of thyroid hormones.

Cautions: Blood tests must be done to check for proper dosage. Do not use in pregnant or nursing animals. Do not give your pet a live vaccine while giving methimazole. Contact your veterinarian immediately if your pet develops signs of an infection. 

Active Ingredients (per tablet) Amount
Methimazole 5 mg
Other Ingredients: 
Lactose Monohydrate, Povidone, Talc, Croscarmellose Sodium, Magnesium Stearate, Corn Starch.


Tip: Do not use in pregnant or nursing animals. Methimazole can be given with or without food.

Pet Weight Dosage
Cats: 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
Dogs: X X
Horses: X X