MethadoneNarcoticsOpiate Substitution TreatmentOpioid-Related DisordersHeroin DependenceMethadyl AcetateBuprenorphineAnalgesics, OpioidNeonatal Abstinence SyndromeHeroinSubstance Abuse DetectionPyrrolidinesDrug OverdoseMorphineDextropropoxypheneSubstance Abuse, IntravenousNarcotic AntagonistsStreet DrugsSubstance-Related DisordersSubstance Withdrawal SyndromeCocaine-Related DisordersOpiumOxidoreductases, N-DemethylatingStereoisomerismMeconiumNaloxoneTherapeutic CommunityDirectly Observed TherapyDrug InteractionsPrisonersDose-Response Relationship, DrugCodeineNaltrexone