Toxicology studies of heroin-related deaths reveal frequent involvement of other central nervous system depressants, including alcohol, benzodiazepines such as diazepam (Valium), and, to a rising degree, methadone.
<heroin, effect, central nervous system depressants>, <heroin, effect, alcohol>, <heroin, effect, benzodiazepines>, <heroin, effect, diazepam>, <heroin, effect, Valium>, <heroin, effect, methadone>