ExoticRx · exoticrx.com/drugs/methimazole
US brand names:Tapazole, Felimazole
Methimazole is dosed at 0.5–1 mg/kg PO q12h in cats, per Plumb's Veterinary Drug Handbook, 9th Ed. Verify against current literature before clinical use.
Inhibits thyroid peroxidase, blocking iodine organification and thyroid hormone synthesis. Does not destroy thyroid tissue.
Cats: monitor renal function (treating hyperthyroidism may unmask underlying renal disease). Side effects include anorexia, vomiting, facial pruritus, and blood dyscrasias. Monitor CBC and liver enzymes.
Species references:All Cat (Domestic) drugs
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