title: Modification by antihistaminic drugs of the morphine analgesia in rabbits.
mesh_terms: D000698:Analgesia; D000818:Animals; D004357:Drug Synergism; D006634:Histamine H1 Antagonists / Q000494:pharmacology*; D007099:Imipramine / Q000494:pharmacology; D009020:Morphine / Q000037:antagonists & inhibitors*; D011817:Rabbits; D012110:Reserpine / Q000494:pharmacology
chemical_list: D006634:Histamine H1 Antagonists; D009020:Morphine; D012110:Reserpine; D007099:Imipramine