CodeineAntitussive AgentsBehavior, AddictiveMorphine DerivativesHydrocodoneNarcoticsSubstance Abuse DetectionMorphineSubstance-Related DisordersAnalgesics, OpioidOpiumOpioid-Related DisordersHeroin DependenceGas Chromatography-Mass SpectrometryNalorphineHydromorphonePapaverDealkylationCocaineHeroinDebrisoquinMethadoneDextropropoxypheneCytochrome P-450 CYP2D6OxycodoneEthylmorphineOxymorphoneCoughSubstance Withdrawal SyndromeTramadolDiphenoxylateTobacco Use DisorderDextromethorphanBuprenorphineStreet DrugsRewardNarcotic Antagonists