Is metabolite a drug?
Active metabolite
An active metabolite is an active form of a drug after it has been processed by the body.
Barbiturate
In the United States, the Controlled Substances Act of 1970 classified most barbiturates as controlled substances—and they remain so . Barbital, methylphenobarbital (also known as mephobarbital), and phenobarbital are designated schedule IV drugs, and "Any substance which contains any quantity of a derivative of barbituric acid, or any salt of a derivative of barbituric acid" (all other barbiturates) were designated as being schedule III. Under the original CSA, no barbiturates were placed in schedule I, II, or V, however amobarbital, pentobarbital, and secobarbital are schedule II controlled substances unless they are in a suppository dosage form.