title: Mechanisms of pain and analgesia as revealed by opiate research: summary and recommendations.
mesh_terms: D000698:Analgesia; D000818:Animals; D004723:Endorphins / Q000502:physiology; D006801:Humans; D009294:Narcotics / Q000627:therapeutic use*; D010146:Pain / Q000188:drug therapy / Q000503:physiopathology*
chemical_list: D004723:Endorphins; D009294:Narcotics