the study included six barbiturates ( amobarbital , barbital , butabarbital , phentobarbital , phenobarbital , and secobarbital ) , four amphetamine-related compounds ( amphetamine , ephedrine , methamphetamine , and phentermine ) , and five other drugs ( cocaine , heroin , phencyclidine , phendimetrazine , and diazepam ) .
C0004745
barbiturates
C0004743
barbital