{"data":{"id":"us/21-cfr-862.3880","jurisdiction":"us","citation":"21 CFR 862.3880","heading":"Theophylline test system.","body":"(a) Identification. A theophylline test system is a device intended to measure theophylline (a drug used for stimulation of the muscles in the cardiovascular, respiratory, and central nervous systems) in serum and plasma. Measurements obtained by this device are used in the diagnosis and treatment of theophylline overdose or in monitoring levels of theophylline to ensure appropriate therapy.\n(b) Classification. Class II.","path":["Title 21—Food and Drugs","CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER H—MEDICAL DEVICES","PART 862—CLINICAL CHEMISTRY AND CLINICAL TOXICOLOGY DEVICES","Subpart D—Clinical Toxicology Test Systems"],"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":"bd0cfa1b9533382026657de3d5ce468883bb54786f47f224a2353ff3abff8e04","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-862.3870","next":"us/21-cfr-862.3900"},"notice":"GroundRules: Original legal text. Not legal advice."}