---
kind: "section"
citation: "21 C.F.R. § 520.1310"
title: "21"
number: "520.1310"
heading: "Marbofloxacin."
url: "https://uscodex.org/cfr/21/520.1310"
---

# §520.1310. Marbofloxacin.

- (a) **Specifications.** Each tablet or chewable tablet contains 25, 50, 100, or 200 milligrams (mg) marbofloxacin.
- (b) **Sponsors.** See sponsors in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter for use as in [paragraph (d)](#d) of this section:
  - (1) **Nos.** 017033, 054771, 069043, and 086117 for use of tablets.
  - (2) **No.** 086101 for use of chewable tablets.
- (c) [Reserved]
- (d) **Conditions of use—**
  - (1) **Amount.** 1.25 mg per pound (/lb) of body weight once daily, but may be increased to 2.5 mg/lb of body weight once daily.
  - (2) **Indications for use.** For the treatment of infections in dogs and cats associated with bacteria susceptible to marbofloxacin.
  - (3) **Limitations.** Federal law restricts this drug to use by or on the order of a licensed veterinarian. Federal law prohibits the extralabel use of this drug in food-producing animals.

## Notes

### Amendments

[64 FR 39919, July 23, 1999, as amended at 66 FR 46369, Sept. 5, 2001; 78 FR 28823, May 20, 2014; 85 FR 45307, July 28, 2020; 88 FR 27698, May 3, 2023; 91 FR 41559, July 7, 2026]

### Authority

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

### Source

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

### Amendments

[64 FR 39919, July 23, 1999, as amended at 66 FR 46369, Sept. 5, 2001; 78 FR 28823, May 20, 2014; 85 FR 45307, July 28, 2020; 88 FR 27698, May 3, 2023; 91 FR 41559, July 7, 2026]