---
kind: "section"
citation: "21 C.F.R. § 558.365"
title: "21"
number: "558.365"
heading: "Neomycin sulfate."
url: "https://uscodex.org/cfr/21/558.365"
---

# §558.365. Neomycin sulfate.

- (a) **Specifications.** Type A medicated article containing 325 grams neomycin sulfate per pound.
- (b) **Sponsor.** See No. 054771 in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter.
- (c) **Related tolerances.** See [§ 556.430](/cfr/21/556.430.md) of this chapter.
- (d) **Special considerations.**
  - (1) Federal law restricts medicated feed containing this veterinary feed directive (VFD) drug to use by or on the order of a licensed veterinarian. See [§ 558.6](/cfr/21/558.6.md) for additional requirements.
  - (2) The expiration date of VFDs for neomycin medicated feeds must not exceed 6 months from the date of issuance. VFDs for neomycin shall not be refilled.
- (e) **Conditions of use.** Neomycin sulfate is used as follows:

## Notes

### Amendments

[64 FR 70576, Dec. 17, 1999, as amended at 65 FR 45881, July 26, 2000; 79 FR 13545, Mar. 11, 2014; 81 FR 95009, Dec. 27, 2016. Redesignated at 83 FR 64742, Dec. 18, 2018]

### Authority

Authority: 21 U.S.C. 354, 360b, 360ccc, 360ccc-1, 371.

### Source

Source: 40 FR 13959, Mar. 27, 1975, unless otherwise noted.

### Amendments

[64 FR 70576, Dec. 17, 1999, as amended at 65 FR 45881, July 26, 2000; 79 FR 13545, Mar. 11, 2014; 81 FR 95009, Dec. 27, 2016. Redesignated at 83 FR 64742, Dec. 18, 2018]