title: Drug abuser deaths.
mesh_terms: D000328:Adult; D000701:Analgesics, Opioid / Q000506:poisoning; D005260:Female; D006801:Humans; D008297:Male; D008691:Methadone / Q000031:analogs & derivatives / Q000506:poisoning; D008875:Middle Aged; D009294:Narcotics / Q000506:poisoning; D011041:Poisoning / Q000401:mortality; D019966:Substance-Related Disorders / Q000401:mortality*; D006113:United Kingdom
chemical_list: D000701:Analgesics, Opioid; D009294:Narcotics; D008691:Methadone; C007527:dipipanone