Modification of morphine analgesia in the rat by biogenic amines administered intraventricularly.
D000698:Analgesia; D000818:Animals; D002552:Cerebral Ventricles; D007267:Injections; D009020:Morphine / Q000037:antagonists & inhibitors*; D009638:Norepinephrine / Q000008:administration & dosage / Q000494:pharmacology; D051381:Rats; D012110:Reserpine / Q000008:administration & dosage / Q000494:pharmacology; D012701:Serotonin / Q000008:administration & dosage / Q000494:pharmacology
D012701:Serotonin; D009020:Morphine; D012110:Reserpine; D009638:Norepinephrine