---
kind: "section"
citation: "21 C.F.R. § 520.999"
title: "21"
number: "520.999"
heading: "Fluralaner oral solution."
url: "https://uscodex.org/cfr/21/520.999"
---

# §520.999. Fluralaner oral solution.

- (a) **Specifications.** Each milliliter (mL) of solution contains 10 milligrams (mg) fluralaner.
- (b) **Sponsor.** See No. 000061 in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter.
- (c) **Conditions of use in laying hens and replacement chickens—**
  - (1) **Amount.** Administer orally to chickens via the drinking water as 2 single doses, spaced 7 days apart, with each dose consumed over a period of 6 to 24 hours. Each dose is 0.5 mg fluralaner/kilogram (kg) (0.227 mg/pound (mg/lb)) body weight, equivalent to 0.05 mL fluralaner oral solution/kg body weight (0.023 mL/lb).
  - (2) **Indications for use.** For the treatment and control of northern fowl mites (Ornithonyssus sylviarum).
  - (3) **Limitations.** Federal law restricts this drug to use by or on the order of a licensed veterinarian. Chickens must not be slaughtered for human consumption for 11 days after the last treatment. No egg discard is required when used according to the labeling.

## Notes

### Amendments

[91 FR 5300, Feb. 6, 2026]

### Authority

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

### Source

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

### Amendments

[91 FR 5300, Feb. 6, 2026]