title: Summaries for patients. Very high doses of methadone may cause abnormal heart rhythm.
mesh_terms: D000328:Adult; D000701:Analgesics, Opioid / Q000008:administration & dosage / Q000009:adverse effects*; D002170:Canada; D002908:Chronic Disease; D005260:Female; D006556:Heroin Dependence / Q000534:rehabilitation; D006801:Humans; D008297:Male; D008691:Methadone / Q000008:administration & dosage / Q000009:adverse effects*; D008875:Middle Aged; D010146:Pain / Q000188:drug therapy; D012189:Retrospective Studies; D012307:Risk Factors; D016171:Torsades de Pointes / Q000139:chemically induced* / Q000175:diagnosis; D014481:United States
chemical_list: D000701:Analgesics, Opioid; D008691:Methadone