{"abstract":"The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of a new animal drug application (NADA) filed by Intervet Inc. The NADA provides for use of approved, single-ingredient Type A medicated articles containing zilpaterol hydrochloride, monensin USP, tylosin phosphate, and melengestrol acetate in four-way combination Type B and Type C medicated feeds for heifers fed in confinement for slaughter.","action":"Final rule; technical amendment.","agencies":[{"raw_name":"DEPARTMENT OF HEALTH AND HUMAN SERVICES","name":"Health and Human Services Department","id":221,"url":"https://www.federalregister.gov/agencies/health-and-human-services-department","json_url":"https://www.federalregister.gov/api/v1/agencies/221","parent_id":null,"slug":"health-and-human-services-department"},{"raw_name":"Food and Drug Administration","name":"Food and Drug Administration","id":199,"url":"https://www.federalregister.gov/agencies/food-and-drug-administration","json_url":"https://www.federalregister.gov/api/v1/agencies/199","parent_id":221,"slug":"food-and-drug-administration"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2008/04/08/E8-7307.html","cfr_references":[{"chapter":null,"citation_url":null,"part":558,"title":21}],"citation":"73 FR 18958","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This rule is effective April 8, 2008.","disposition_notes":null,"docket_ids":[],"dockets":[],"document_number":"E8-7307","effective_on":"2008-04-08","end_page":18960,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2008/04/08/E8-7307.xml","html_url":"https://www.federalregister.gov/documents/2008/04/08/E8-7307/new-animal-drugs-for-use-in-animal-feed-zilpaterol-technical-amendment","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/E8-7307?publication_date=2008-04-08","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2008-04-08/E8-7307/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":28,"last_updated":"2026-07-27 18:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2008-04-08/pdf/E8-7307.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2008-04-08","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2008/04/08/E8-7307.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{"checked_regulationsdotgov_at":"2011-11-14T01:52:40Z"},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":18958,"subtype":null,"title":"New Animal Drugs for Use in Animal Feed; Zilpaterol; Technical Amendment","toc_doc":"Zilpaterol; Technical Amendment","toc_subject":"New Animal Drugs for Use in Animal Feed:","topics":["Animal drugs"],"type":"Rule","volume":73}