---
kind: "section"
citation: "21 C.F.R. § 558.300"
title: "21"
number: "558.300"
heading: "Ivermectin."
url: "https://uscodex.org/cfr/21/558.300"
---

# §558.300. Ivermectin.

- (a) **Specifications.** Type A medicated article containing 2.72 grams ivermectin per pound (g/lb).
- (b) **Sponsor.** See No. 000010 in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter.
- (c) **Related tolerances.** See [§ 556.344](/cfr/21/556.344.md) of this chapter.
- (d) **Special considerations.** See [§ 500.25](/cfr/21/500.25.md) of this chapter.
- (e) **Conditions of use in swine.** It is used in feed as follows:

## Notes

### Amendments

[72 FR 37437, July 10, 2007, as amended at 81 FR 17609, Mar. 30, 2016; 81 FR 95005, Dec. 27, 2016; 84 FR 12499, Apr. 2, 2019; 84 FR 39185, Aug. 9, 2019]

### Authority

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

### Source

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

### Amendments

[72 FR 37437, July 10, 2007, as amended at 81 FR 17609, Mar. 30, 2016; 81 FR 95005, Dec. 27, 2016; 84 FR 12499, Apr. 2, 2019; 84 FR 39185, Aug. 9, 2019]