---
kind: "section"
citation: "21 C.F.R. § 520.852"
title: "21"
number: "520.852"
heading: "Estriol."
url: "https://uscodex.org/cfr/21/520.852"
---

# §520.852. Estriol.

- (a) **Specifications.** Each tablet contains 1 milligram (mg) estriol.
- (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 at an initial dose of 2 mg per dog per day. The dosage may be titrated to as low as 0.5 mg per dog every second day, depending on response.
  - (2) **Indications for use.** For the control of estrogen-responsive urinary incontinence in ovariohysterectomized female dogs.
  - (3) **Limitations.** Federal law restricts this drug to use by or on the order of a licensed veterinarian.

## Notes

### Amendments

[76 FR 78150, Dec. 16, 2011]

### Authority

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

### Source

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

### Amendments

[76 FR 78150, Dec. 16, 2011]