title: The effect of promethazine on the antinociceptive actions of some narcotic analgesics.
mesh_terms: D000818:Animals; D003061:Codeine / Q000037:antagonists & inhibitors*; D004597:Electroshock; D005260:Female; D003932:Heroin / Q000037:antagonists & inhibitors*; D008614:Meperidine / Q000037:antagonists & inhibitors*; D051379:Mice; D009020:Morphine / Q000037:antagonists & inhibitors*; D011398:Promethazine / Q000494:pharmacology*
chemical_list: D003932:Heroin; D009020:Morphine; D008614:Meperidine; D011398:Promethazine; D003061:Codeine