极小剂量纳洛酮增强电针的镇痛作用但不影响电针对吗啡戒断症状的抑制作用

• ULTRA-LOW DOSE OF NALOXONE POTENTIATES ANALGESIC EFFECT INDUCED BY ELECTROACUPUNCTURE, BUT DOES NOT AFFECT ITS SUPPRESSIVE EFFECT ON MORPHINE WITHDRAWAL IN RATS