{"data":{"id":"us/21-cfr-201.129","jurisdiction":"us","citation":"21 CFR 201.129","heading":"Drugs; exemption for radioactive drugs for research use.","body":"A radioactive drug intended for administration to human research subjects during the course of a research project intended to obtain basic research information regarding metabolism (including kinetics, distribution, and localization) of a radioactively labeled drug or regarding human physiology, pathophysiology, or biochemistry (but not intended for immediate therapeutic, diagnostic, or similar purposes), under the conditions set forth in § 361.1 of this chapter, shall be exempt from section 502(f)(1) of the act if the packaging, label, and labeling are in compliance with § 361.1(f) of this chapter.","path":["Title 21—Food and Drugs","CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER C—DRUGS: GENERAL","PART 201—LABELING","Subpart D—Exemptions From Adequate Directions for Use"],"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":"fe5fa0393c0afe871db5de3b0b0190c00baa0a0198a7551c25e2528dd1051802","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-201.128","next":"us/21-cfr-201.130"},"notice":"GroundRules: Original legal text. Not legal advice."}