title: [It all depends on the formulation].
mesh_terms: D000701:Analgesics, Opioid / Q000737:chemistry* / Q000627:therapeutic use*; D000758:Anesthesia / Q000639:trends*; D004339:Drug Compounding / Q000639:trends*; D006801:Humans
chemical_list: D000701:Analgesics, Opioid