MethadoneNarcoticsOpiate Substitution TreatmentOpioid-Related DisordersHeroin DependenceMethadyl AcetateBuprenorphineAnalgesics, OpioidNeonatal Abstinence SyndromeHeroinGene DosageDosage Compensation, GeneticSubstance Abuse DetectionPyrrolidinesDosage FormsDrug OverdoseMorphineDextropropoxypheneSubstance Abuse, IntravenousNarcotic AntagonistsStreet DrugsSubstance-Related DisordersSubstance Withdrawal SyndromeDose-Response Relationship, DrugOpiumCocaine-Related DisordersOxidoreductases, N-DemethylatingStereoisomerismDrug InteractionsMeconiumNaloxoneTherapeutic CommunityDirectly Observed TherapyPrisonersCodeineNaltrexoneCytochrome P-450 CYP3A