title: Heroin overdose on the rise again? (toxicology of morphine).
mesh_terms: D004361:Drug Tolerance; D004335:Drug and Narcotic Control; D005260:Female; D006556:Heroin Dependence / Q000401:mortality*; D006801:Humans; D008297:Male; D009020:Morphine / Q000633:toxicity*; D011647:Puerto Rico; D013375:Substance Withdrawal Syndrome; D019966:Substance-Related Disorders; D014481:United States
chemical_list: D009020:Morphine