title: Chronic hypercapnia during methadone maintenance.
mesh_terms: D000328:Adult; D002908:Chronic Disease; D005260:Female; D006556:Heroin Dependence / Q000188:drug therapy; D006801:Humans; D006935:Hypercapnia / Q000139:chemically induced*; D007040:Hypoventilation / Q000139:chemically induced*; D008297:Male; D008691:Methadone / Q000009:adverse effects*
chemical_list: D008691:Methadone