{"topic_id":"FDA_medicated_pet_food_CFR225","category":"fda","context":"---\ntopic_id: \"FDA_medicated_pet_food_CFR225\"\ncategory: \"fda\"\ntitle: \"FDA medicated pet food CFR225\"\nlang: en\nsource_document: \"U.S. FDA / CVM — 21 CFR Part 225\"\ncitation:\n  authority: \"fda\"\n  title: \"FDA medicated pet food CFR225\"\n  url: \"https://www.ecfr.gov/current/title-21/part-225\"\n  retrieved: \"\"\n  ref: \"21 CFR Part 225\"\n  doc_type: \"official web page\"\n  needs_review: false\nauthority_tier: T1\nauthority_tier_basis: \"T1:fda\"\nauthority_tier_date: 2026-08-04\n---\n21 CFR Part 225 (current Good Manufacturing Practice for Medicated Feeds) applies when pet food contains a drug (e.g., nitarsone, decoquinate, lasalocid) for treatment/prevention of specific disease. Common medicated pet foods: (1) nitarsone-containing chicken feed historically (FDA banned in 2015); (2) Hills Prescription Diet j/d — contains high omega-3 doses considered drug-relevant; (3) Royal Canin Calm — contains alpha-casozepine at functional dose (not currently classified as drug by FDA but functionally relevant). Medicated pet food requirements: NADA-approved drug substance; Type A/B/C medicated feed license; manufacturing per CFR 225 GMP; label includes drug name, amount, indications, withdrawal period (if animal-derived products are food-relevant). The 2024 FDA guidance clarified that structure/function pet food claims (e.g., 'joint support') are NOT drug claims and do NOT require NADA — but disease treatment claims (e.g., 'treats OA pain') DO require NADA.\n","sources":["fda — FDA medicated pet food CFR225"],"source":{"authority":"fda","title":"FDA medicated pet food CFR225","url":"https://www.ecfr.gov/current/title-21/part-225","retrieved":"","ref":"","doc_type":"official source","source_document":"U.S. FDA / CVM — 21 CFR Part 225","verification_file":""},"source_document":"U.S. FDA / CVM — 21 CFR Part 225","source_file":"","trust":{"authority_tier":"T1","fidelity":"verbatim","license":null,"display_grade":"A"},"tokens_estimated":176,"generated_at":"2026-07-16","tip":"Use /api/v1/topics to discover more topics. /api/v1/nutrient for precise single-point queries. /api/v1/cross_compare for 2-3 standard comparisons."}