---
kind: "section"
citation: "21 C.F.R. § 520.1921"
title: "21"
number: "520.1921"
heading: "Prochlorperazine, isopropamide, and neomycin."
url: "https://uscodex.org/cfr/21/520.1921"
---

# §520.1921. Prochlorperazine, isopropamide, and neomycin.

- (a) **Specifications.** Each capsule contains either:
  - (1) **Capsule No.** 1: 3.33 milligrams of prochlorperazine (as the dimaleate), 1.67 milligrams of isopropamide (as the iodide), and 25 milligrams of neomycin base (as the sulfate); or
  - (2) **Capsule No.** 3: 10 milligrams of prochlorperazine (as the dimaleate), 5 milligrams of isopropamide (as the iodide), and 75 milligrams of neomycin base (as the sulfate).
- (b) **Sponsor.** See No. 054771 in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter.
- (c) **Conditions of use in dogs—**
  - (1) **Amount.** Administer capsules orally twice daily to dogs as follows:
  - (2) **Indications for use.** For the treatment infectious bacterial gastroenteritis associated with emotional stress.
  - (3) **Limitations.** Federal law restricts this drug to use by or on the order of a licensed veterinarian.

## Notes

### Amendments

[49 FR 14103, Apr. 10, 1984, as amended at 56 FR 50653, Oct. 8, 1991; 60 FR 55659, Nov. 2, 1995; 79 FR 28827, May 20, 2014]

### Authority

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

### Source

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

### Amendments

[49 FR 14103, Apr. 10, 1984, as amended at 56 FR 50653, Oct. 8, 1991; 60 FR 55659, Nov. 2, 1995; 79 FR 28827, May 20, 2014]