21 CFR §522.1503
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
- (a)Specifications. Each milliliter of solution contains 2 milligrams (mg) neostigmine methylsulfate.
- (b)Sponsor. See No. 000061 in § 510.600(c) of this chapter.
- (c)Conditions of use—(1) Amount. Administer to cattle and horses at a dosage level of 1 mg per (/) 100 pounds (lbs) of body weight subcutaneously. Administer to sheep at a dosage level of 1 to 1 1/2 mg/100 lbs body weight subcutaneously. Administer to swine at a dosage level of 2 to 3 mg/100 lbs body weight intramuscularly. These doses may be repeated as indicated.
- (2)Indications for use. For treating rumen atony; initiating peristalsis which causes evacuation of the bowel; emptying the urinary bladder; and stimulating skeletal muscle contractions.
- (3)Limitations. Not for use in animals producing milk, since this use will result in contamination of the milk. Federal law restricts this drug to use by or on the order of a licensed veterinarian.