Sedative abuse by heroin addicts.
D001463:Barbiturates; D011307:Drug Prescriptions; D005194:Family Practice; D003932:Heroin; D006801:Humans; D006993:Hypnotics and Sedatives; D008131:London; D009021:Morphine Dependence; D010607:Pharmacy Service, Hospital; D019966:Substance-Related Disorders
D001463:Barbiturates; D006993:Hypnotics and Sedatives; D003932:Heroin