{"data":{"id":"us/21-cfr-520.90b","jurisdiction":"us","citation":"21 CFR 520.90b","heading":"b Ampicillin capsules.","body":"(a) Specifications. Each capsule contains ampicillin trihydrate equivalent to 125, 250, or 500 milligrams of ampicillin.\n(b) Sponsor. See No. 054771 in § 510.600(c) of this chapter.\n(c) Conditions of use—(1) Dogs—(i) Amount. 5 to 10 milligrams per pound of body weight two or three times daily. In severe or acute conditions, 10 milligrams per pound of body weight, three times daily. Administer 1 to 2 hours prior to feeding.\n(ii) Indications for use. Treatment against strains of gram-negative and gram-positive organisms sensitive to ampicillin and associated with respiratory tract infections (tracheobronchitis and tonsillitis); urinary tract infections (cystitis); bacterial gastroenteritis; generalized infections (septicemia) associated with abscesses, lacerations, and wounds; and bacterial dermatitis.\n(iii) Limitations. Federal law restricts this drug to use by or on the order of a licensed veterinarian.\n(2) Cats—(i) Amount. 10 to 30 milligrams per pound of body weight or three times daily. Administer 1 to 2 hours prior to feeding.\n(ii) Indications for use. Treatment against strains of gram-negative and gram-positive organisms sensitive to ampicillin and associated with respiratory tract infections (bacterial pneumonia); urinary tract infections (cystitis); and generalized infections (septicemia) associated with abscesses, lacerations, and wounds.\n(iii) Limitations. Federal law restricts this drug to use by or on the order of a licensed veterinarian.","path":["Title 21—Food and Drugs","CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER E—ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS","PART 520—ORAL DOSAGE FORM NEW ANIMAL DRUGS"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-21.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:47Z","sha256":"dc177c162082007dc6873939a83d6ad57d3da1bb21fcf3e2cd3688392928a96d","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-520.90a","next":"us/21-cfr-520.90c"},"notice":"GroundRules: Original legal text. Not legal advice."}