U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 28, 2025
(a) Identification. A phenobarbitol test system is a device intended to measure phenobarbital, an antiepileptic and sedative-hypnotic drug, in human specimens. Measurements obtained by this device are used in the diagnosis and treatment of phenobarbital use or overdose and in monitoring levels of phenobarbital to ensure appropriate therapy.
(b) Classification. Class II.