---
kind: "section"
citation: "21 C.F.R. § 522.2424"
title: "21"
number: "522.2424"
heading: "Thiamylal."
url: "https://uscodex.org/cfr/21/522.2424"
---

# §522.2424. Thiamylal.

- (a) **Specifications.** The drug is a sterile powder. It is reconstituted with sterile distilled water, water for injection, or sodium chloride injection, to a desired concentration of 0.5 to 4 percent sodium thiamylal.
- (b) **Sponsors.** See Nos. 054771 and 069043 in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter.
- (c) **Conditions of use—**
  - (1) **Amount.** Administer by intravenous injection to effect. The average single dose is:
    - (i) **Dogs and cats—** 8 milligrams (mg) per pound of body weight (when used with a preanesthetic, generally one-half the normal dose).
    - (ii) **Swine—** 40 mg per 5 pounds (lbs) of body weight.
    - (iii) **Horses—** Light anesthesia, 1 gram per 500 lbs to 1,100 lbs of body weight; deep anethesia, 1 gram per 300 lbs of body weight (40 mg/12 lbs of body weight).
    - (iv) **Cattle—** Short duration, 20 mg/5 lbs of body weight; longer duration, 40 mg/7 lbs of body weight.
  - (2) **Indications for use.** It is used as an ultra-short-acting anesthetic in dogs, cats, swine, horses, and cattle.
  - (3) **Limitations.** Do not use in horses intended for human consumption. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

## Notes

### Amendments

[79 FR 16196, Mar. 25, 2014, as amended at 83 FR 48946, Sept. 28, 2018]

### Authority

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

### Source

Source: 40 FR 13858, Mar. 27, 1975, unless otherwise noted.

### Amendments

[79 FR 16196, Mar. 25, 2014, as amended at 83 FR 48946, Sept. 28, 2018]