---
kind: "section"
citation: "21 C.F.R. § 520.1341"
title: "21"
number: "520.1341"
heading: "Megestrol."
url: "https://uscodex.org/cfr/21/520.1341"
---

# §520.1341. Megestrol.

- (a) **Specifications.** Each tablet contains 5 or 20 milligrams of megestrol acetate.
- (b) **Sponsor.** See No. 000061 in [§ 510.600(c)](/cfr/21/510.600.md?p=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.

## Notes

### Amendments

[40 FR 13838, Mar. 27, 1975, as amended at 52 FR 7832, Mar. 13, 1987; 78 FR 28824, May 20, 2014]

### Authority

Authority: 21 U.S.C. 360b.

### Source

Source: 40 FR 13838, Mar. 27, 1975, unless otherwise noted.

### Amendments

[40 FR 13838, Mar. 27, 1975, as amended at 52 FR 7832, Mar. 13, 1987; 78 FR 28824, May 20, 2014]