Euthanasia, PassiveMethadoneWithholding TreatmentTreatment OutcomeSubstance Withdrawal SyndromeNarcoticsOpiate Substitution TreatmentOpioid-Related DisordersHeroin DependenceMethadyl AcetateBuprenorphineAnalgesics, OpioidNeonatal Abstinence SyndromeHeroinAlcohol Withdrawal DeliriumAlcohol Withdrawal SeizuresMorphineNaloxoneSubstance Abuse DetectionPyrrolidinesMorphine DependenceDrug OverdoseDextropropoxypheneSubstance-Related DisordersCocaine-Related DisordersStreet DrugsSubstance Abuse, IntravenousOpiumDose-Response Relationship, DrugNarcotic AntagonistsCocaine