title: The levels of methadone in the plasma in methadone maintenance.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D006207:Half-Life; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D008691:Methadone / Q000008:administration & dosage / Q000097:blood* / Q000652:urine; D019966:Substance-Related Disorders; D013997:Time Factors
chemical_list: D008691:Methadone