Drug OverdoseHeroin DependenceNaloxoneNarcotic AntagonistsOpioid-Related DisordersAnalgesics, OpioidNarcoticsReceptors, Opioid, muReceptors, OpioidReceptors, Opioid, deltaReceptors, Opioid, kappaOpioid PeptidesAcetaminophenMethadoneAnalgesics, Non-NarcoticNaltrexoneBuprenorphineMorphine DerivativesMorphineCharcoalPrescription Drug MisusePoisoningHeroinStreet DrugsSuicide, AttemptedEnkephalinsAntidotesEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Substance Abuse, IntravenousOpiate AlkaloidsCodeineSelf AdministrationPrescription DrugsEnkephalin, D-Penicillamine (2,5)-Cocaine-Related DisordersOpiate Substitution TreatmentSubstance-Related DisordersSubstance Withdrawal SyndromeEndorphinsDynorphinsDrug UsersDrug and Narcotic ControlDrug-Induced Liver InjurySubstance Abuse DetectionEnkephalin, LeucineCocainePain