§ 520.1375 Methimazole tablets.
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
Specifications.(a) Each tablet contains 2.5 or 5 milligrams (mg) methimazole.
Sponsors,(b) See Nos. 043264 and 086101in § 510.600 of this chapter.
Conditions of use in catsAmount.(c) —(1) 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.
Indications for use.(2) For the treatment of hyperthyroidism.
Limitations.(3) Federal law restricts this drug to use by or on the order of a licensed veterinarian.
[74 FR 27707, June 11, 2009. Redesignated and amended at 89 FR 95103, Dec. 2, 2024; 90 FR 40970, Aug. 22, 2025]
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