{"data":{"id":"us/21-cfr-558.235","jurisdiction":"us","citation":"21 CFR 558.235","heading":"Efrotomycin.","body":"(a) Specifications. Type A medicated articles containing 14.5 grams efrotomycin per pound.\n(b) Sponsor. See No. 000010 in § 510.600(c) of this chapter.\n(c) Related tolerances. See § 556.224 of this chapter.\n(d) Conditions of use in swine—\nEfrotomycin in grams/ton Indications for use Limitations Sponsor\n(1) 3.6 Swine: For improved feed efficiency Feed continuously as sole ration. Not to be used in swine weighing more than 250 pounds 000010\n(2) 3.6 to 14.5 Swine: For increased rate of weight gain Feed continuously as sole ration. Not to be used in swine weighing more than 250 pounds 000010","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 558—NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS","Subpart B—Specific New Animal Drugs for Use in Animal Feeds"],"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":"256f4824f2e5d9f17a47f61c409367e3c9307ab7e58c89416d002a36ef676094","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-558.205","next":"us/21-cfr-558.248"},"notice":"GroundRules: Original legal text. Not legal advice."}