Opioids/opiates analgesic response modified by calcium.
D000698:Analgesia; D000818:Animals; D002118:Calcium / Q000502:physiology*; D004723:Endorphins; D008297:Male; D009292:Narcotic Antagonists; D009294:Narcotics; D051381:Rats
D004723:Endorphins; D009292:Narcotic Antagonists; D009294:Narcotics; D002118:Calcium