title: Enhancement of morphine analgesia after acute and chronic haloperidol.
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects; D003342:Corpus Striatum / Q000187:drug effects / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D004357:Drug Synergism; D006220:Haloperidol / Q000494:pharmacology*; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D009270:Naloxone / Q000378:metabolism; D010146:Pain; D051381:Rats; D011957:Receptors, Opioid / Q000187:drug effects / Q000378:metabolism; D013134:Spiperone / Q000378:metabolism
chemical_list: D011957:Receptors, Opioid; D009270:Naloxone; D013134:Spiperone; D009020:Morphine; D006220:Haloperidol