title: Beta-Endorphin as a potent analgesic by intravenous injection.
mesh_terms: D000698:Analgesia; D000818:Animals; D007275:Injections, Intravenous; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR; D009020:Morphine / Q000494:pharmacology; D009270:Naloxone / Q000494:pharmacology; D010455:Peptides / Q000008:administration & dosage / Q000037:antagonists & inhibitors / Q000494:pharmacology*
chemical_list: D010455:Peptides; D009270:Naloxone; D009020:Morphine