title: Review and overview of four decades of opiate research.
mesh_terms: D000818:Animals; D004361:Drug Tolerance; D004723:Endorphins / Q000494:pharmacology; D004745:Enkephalins / Q000494:pharmacology; D049673:History, 20th Century; D006801:Humans; D007477:Ions / Q000378:metabolism; D050356:Lipid Metabolism; D008691:Methadone / Q000627:therapeutic use; D009022:Morphine Derivatives / Q000266:history; D009269:Nalorphine / Q000266:history; D009294:Narcotics / Q000266:history / Q000378:metabolism / Q000494:pharmacology*; D011957:Receptors, Opioid / Q000187:drug effects; D019966:Substance-Related Disorders / Q000503:physiopathology
chemical_list: D004723:Endorphins; D004745:Enkephalins; D007477:Ions; D009022:Morphine Derivatives; D009294:Narcotics; D011957:Receptors, Opioid; D009269:Nalorphine; D008691:Methadone