Increased nociceptive reactivity in mice after the administration of newer opioid antagonists--further evidence for a role of endogenous opioids.
D000818:Animals; D004723:Endorphins / Q000502:physiology*; D008297:Male; D051379:Mice; D009292:Narcotic Antagonists / Q000494:pharmacology*; D009619:Nociceptors / Q000187:drug effects*; D011930:Reaction Time / Q000187:drug effects; D011957:Receptors, Opioid / Q000187:drug effects
D004723:Endorphins; D009292:Narcotic Antagonists; D011957:Receptors, Opioid