title: Blind comparison of once-daily and twice-daily dosage schedules in a methadone program.
mesh_terms: D002986:Clinical Trials as Topic; D005069:Evaluation Studies as Topic; D006207:Half-Life; D003932:Heroin / Q000652:urine; D006801:Humans; D007700:Kinetics; D008691:Methadone / Q000008:administration & dosage* / Q000378:metabolism / Q000627:therapeutic use; D013375:Substance Withdrawal Syndrome / Q000188:drug therapy; D019966:Substance-Related Disorders / Q000188:drug therapy
chemical_list: D003932:Heroin; D008691:Methadone