title: Some features of modern pharmacology.
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects; D004723:Endorphins / Q000502:physiology; D008024:Ligands; D009292:Narcotic Antagonists / Q000494:pharmacology; D009294:Narcotics / Q000494:pharmacology; D009411:Nerve Endings / Q000187:drug effects; D010146:Pain / Q000503:physiopathology*; D011957:Receptors, Opioid / Q000187:drug effects; D014326:Tropanes / Q000494:pharmacology*
chemical_list: D004723:Endorphins; D008024:Ligands; D009292:Narcotic Antagonists; D009294:Narcotics; D011957:Receptors, Opioid; D014326:Tropanes; C016808:3-tropinone; C005864:tropine