title: Circadian variation of the lethality of methadone.
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D004361:Drug Tolerance; D007928:Lethal Dose 50; D008691:Methadone / Q000633:toxicity*; D011336:Probability; D051381:Rats
chemical_list: D008691:Methadone