“…However, this association is sometimes difficult to prove and is probably often underreported. Drugs commonly reported to be associated with ED are cardiovascular drugs, histamine-2 receptor antagonists, hormones, anticholinergics, psychotropics, and certain cytotoxic medications (Meinhardt, Kropman, Vermeij, Nijeholt, & Zwartendijk, 1997). Lifestylerelated risk factors for ED include chronic alcoholism and chronic use of marijuana, codeine, meperidine, methadone, and heroin (Lewis, 2001).…”