---
kind: "section"
citation: "21 C.F.R. § 335.3"
title: "21"
number: "335.3"
heading: "Definitions."
url: "https://uscodex.org/cfr/21/335.3"
---

# §335.3. Definitions.


As used in this part:

- (a) **Antidiarrheal.** A drug that can be shown by objective measurement to treat or control (stop) the symptoms of diarrhea.
- (b) **Diarrhea.** A condition characterized by increased frequency of loose, watery stools (three or more daily) during a limited period (24 to 48 hours), usually with no identifiable cause.
- (c) **Travelers' diarrhea.** A subset of diarrhea occurring in travelers that is most commonly caused by an infectious agent.

## Notes

### Amendments

[68 FR 18881, Apr. 17, 2003, as amended at 69 FR 26302, May 12, 2004]

### Authority

Authority: 21 U.S.C. 321, 351, 352, 353, 355, 360, 371.

### Source

Source: 68 FR 18881, April 17, 2003, unless otherwise noted.

### Amendments

[68 FR 18881, Apr. 17, 2003, as amended at 69 FR 26302, May 12, 2004]