title: Acupuncture tolerance in rats: anti-opiate substrates implicated.
mesh_terms: D015670:Acupuncture Therapy; D000698:Analgesia; D000818:Animals; D001923:Brain Chemistry; D009020:Morphine / Q000494:pharmacology; D009892:Opium / Q000031:analogs & derivatives / Q000037:antagonists & inhibitors*; D051381:Rats
chemical_list: D009020:Morphine; D009892:Opium