Methimazole Dosage Calculator

Methimazole Dosage for Cats By Weight
Trade Names: Tapazole, Felimazole, Thiamazole, and generic
Functional classification: Antithyroid agent

Methimazole Dosing for Cats By Weight

Important Safety Information

For transdermal administration: Alternate ears with each dose, and wear gloves when applying.

Monitor T4 concentrations regularly and adjust dose accordingly. If 5 mg per cat per day is not effective, a dose of 10 mg per cat per day may improve response.

Reference Source

Saunders Handbook of VETERINARY DRUGS, Page 533-535

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Standard Dosage Guidelines

Small Animal Dosage

Species Route Dosage Frequency Duration
Cats PO 2.5 mg/cat initially, then 5-10 mg/cat q12h 7-14 days initially, then adjust as needed
Transdermal 2.5 mg/cat initially, then 5-10 mg/cat Twice daily or 5 mg once daily Adjust based on response

Large Animal Dosage

Species Route Dosage Frequency
Large Animals - No large animal doses have been reported -