title: Possible association between methadone and potentially fatal cardiac arrhythmia.
mesh_terms: D000701:Analgesics, Opioid / Q000009:adverse effects*; D006801:Humans; D008691:Methadone / Q000009:adverse effects*; D016171:Torsades de Pointes / Q000139:chemically induced* / Q000401:mortality
chemical_list: D000701:Analgesics, Opioid; D008691:Methadone