CyclazocineMethadoneReceptors, PhencyclidineNalorphinePhenazocineNarcoticsPentazocineOpioid-Related DisordersOpiate Substitution TreatmentHeroin DependenceAnalgesics, OpioidDrug and Narcotic ControlBehavior, AddictiveBuprenorphineSubstance-Related DisordersHeroinNarcotic AntagonistsMethadyl AcetateOpiumLevorphanolMorphineNeonatal Abstinence SyndromeMeperidineLevallorphan