21 CFR 520.1375

§ 520.1375 Methimazole tablets.

United States · 21 CFR — Food and Drugs · Status: effective

Cite this

Citation: 21 CFR 520.1375, § 520.1375 Methimazole tablets, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/87223
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Full text

(a) Specifications. Each tablet contains 2.5 or 5 milligrams (mg) methimazole. (b) Sponsors, See Nos. 043264 and 086101in § 510.600 of this chapter. (c) Conditions of use in cats—(1) Amount. The starting dose is 2.5 mg every 12 hours. Following 3 weeks of treatment, the dose should be titrated to effect based on individual serum total T4 (TT4) levels and clinical response. Dose adjustments should be made in 2.5 mg increments. The maximum total dosage is 20 mg per day divided, not to exceed 10 mg as a single administration. (2) Indications for use. For the treatment of hyperthyroidism. (3) Limitations. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

Legislative history

This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.