CodeineHeroin DependenceMorphine DerivativesNarcoticsAntitussive AgentsSubstance Abuse DetectionHydrocodoneMorphineMethadoneGas Chromatography-Mass SpectrometryAnalgesics, OpioidPapaverHydromorphoneNalorphineDealkylationOpiumDebrisoquinDextropropoxypheneCytochrome P-450 CYP2D6Opioid-Related DisordersBuprenorphineSelf AdministrationStreet DrugsEthylmorphineOxymorphoneSweatNaloxoneCoughDiphenoxylateOxycodoneDrug OverdoseDextromethorphanHeroin