21 CFR 520.1341
§ 520.1341 Megestrol.
United States · 21 CFR — Food and Drugs · Status: effective
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- Citation
- 21 CFR 520.1341, § 520.1341 Megestrol, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/87221
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Full text
(a) Specifications. Each tablet contains 5 or 20 milligrams of megestrol acetate.
(b) Sponsor. See No. 000061 in § 510.600(c) of this chapter.
(c) Conditions of use in dogs—(1) Amount. Administer orally, intact, or crushed and mixed with food as follows:
(i) For the postponement of estrus by proestrus treatment: 1 milligram per pound of body weight per day for 8 days.
(ii) For the postponement of estrus by anestrus treatment: 0.25 milligram per pound of body weight per day for 32 days.
(iii) For alleviation of false pregnancy: 1 milligram per pound of body weight per day for 8 days.
(2) Indications for use. For the postponement of estrus and the alleviation of false pregnancy in female dogs.
(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.