title: Physiological disposition and metabolism of levo-methadone-1- 3 H in nontolerant and tolerant rats.
mesh_terms: D000698:Analgesia; D000818:Animals; D001921:Brain / Q000378:metabolism; D002855:Chromatography, Thin Layer; D004361:Drug Tolerance; D005243:Feces / Q000378:metabolism; D008297:Male; D008691:Methadone / Q000032:analysis / Q000097:blood / Q000378:metabolism* / Q000652:urine; D008722:Methods; D051381:Rats; D012997:Solvents; D013997:Time Factors; D014316:Tritium
chemical_list: D012997:Solvents; D014316:Tritium; D008691:Methadone