21 CFR 558.348
§ 558.348 Mibolerone.
United States · 21 CFR — Food and Drugs · Status: effective
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- Citation
- 21 CFR 558.348, § 558.348 Mibolerone, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/87872
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Full text
(a) Specifications. Each 6.5 ounce can contains 30 or 60 micrograms (µg) of mibolerone.
(b) Sponsor. See No. 054771 in § 510.600(c) of this chapter.
(c) Conditions of use in dogs—(1) Amount. 30 µg for animals weighing up to 25 pounds; 60 µg for animals weighing 26 to 50 pounds; 120 µg for animals weighing 51 to 100 pounds; 180 µg for animals weighing over 100 pounds, or German Shepherds or German Shepherd mix weighing 30 to 80 pounds. Administer daily at least 30 days before expected initiation of heat and continue as long as desired, but for not more than 12 months.
(2) Indications for use. For the prevention of estrus (heat) in adult female dogs not intended primarily for breeding purposes.
(3) Limitations. Mibolerone should not be used in bitches before first estrous period or in purebred Bedlington terriers. It is not intended for animals being used primarily for breeding purposes. Use orally in adult female dogs only. 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.