Federal regulations · Through 2026-08-25 · Newer source version available

21 CFR 522.1290: Luprostiol.

(a) Specifications. Each milliliter of solution contains 7.5 milligrams (mg) luprostiol.
(b) Sponsor. See No. 051311 in § 510.600(c) of this chapter.
(c) Special considerations. Labeling shall bear the following statements: Warning: Women of childbearing age, asthmatics, and persons with bronchial and other respiratory problems should exercise extreme caution when handling this product. In the early stages, women may be unaware of their pregnancies. Luprostiol is readily absorbed through the skin and can cause abortion and/or bronchiospasms. Direct contact with the skin should therefore be avoided. Accidental spillage on the skin should be washed off immediately with soap and water.
(d) Conditions of use in horses—(1) Amount. 7.5 mg by intramuscular injection.
(2) Indications for use. For estrus control and termination of pregnancy in mares.
(3) Limitations. Federal law restricts this drug to use by or on the order of a licensed veterinarian. Do not use in horses intended for human consumption.

Where this section sits in the code

Title 21—Food and Drugs
CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES
SUBCHAPTER E—ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS
PART 522—IMPLANTATION OR INJECTABLE DOSAGE FORM NEW ANIMAL DRUGS

(a) Specifications. Each milliliter of solution contains 7.5 milligrams (mg) luprostiol.

(b) Sponsor. See No. 051311 in § 510.600(c) of this chapter.

(c) Special considerations. Labeling shall bear the following statements: Warning: Women of childbearing age, asthmatics, and persons with bronchial and other respiratory problems should exercise extreme caution when handling this product. In the early stages, women may be unaware of their pregnancies. Luprostiol is readily absorbed through the skin and can cause abortion and/or bronchiospasms. Direct contact with the skin should therefore be avoided. Accidental spillage on the skin should be washed off immediately with soap and water.

(d) Conditions of use in horses—(1) Amount. 7.5 mg by intramuscular injection.

(2) Indications for use. For estrus control and termination of pregnancy in mares.

(3) Limitations. Federal law restricts this drug to use by or on the order of a licensed veterinarian. Do not use in horses intended for human consumption.

Collected 2026-08-27T02:24:47Z. Source file · JSON

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