RT Journal Article SR Electronic T1 Plasma testosterone levels in heroin addiction and during methadone maintenance. JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 211 OP 217 VO 192 IS 1 A1 J H Mendelson A1 J E Mendelson A1 V D Patch YR 1975 UL http://jpet.aspetjournals.org/content/192/1/211.abstract AB Heroin use was consistently associated with low plasma testosterone levels in narcotic addicts. Heroin addicts maintained on high dosage methadone (80-150 mg/day) also had depressed testosterone levels. Patients on low dosage methadone maintenance (10-60 mg/day) had testosterone levels which were not significant;y different from normal adult male controls. An inverse relationship between methadone dosage and plasma testosterone occurred during methadone detoxification. These findings indicate that heroin and methadone alter male androgen levels with possible derivative effects upon sexual and aggressive behaviors.