Auricular acupuncture: a potential treatment for anxiety.

Acupuncture can be an effective treatment for chronic anxiety disorders. The purpose of this study was to assess the effectiveness of acupuncture in reducing anxiety in a volunteer population. If found effective, this modality could be introduced as a treatment of anxiety before surgery. Adult volunteers (n = 55), were randomized to three treatment groups: a) Shenmen group--bilateral auricular acupuncture at the "shenmen" point; b) Relaxation group-bilateral auricular acupuncture at a "relaxation" point; and c) Sham group-bilateral auricular acupuncture at a "sham" point. Press-acupuncture needles were inserted at the respective auricular areas for 48 h. State anxiety, blood pressure, heart rate, and electrodermal activity were assessed at 30 min, 24 h, and 48 h after insertion. Analyzing anxiety levels using repeated-measures analysis of variance has demonstrated a significant difference [F (2,51) =8.8, P = 0.001] between the three treatment groups. Post hoc analysis demonstrated that patients in the Relaxation group were significantly less anxious at 30 min (P = 0.007) and 24 h (P = 0.035) as compared with patients in both the Shenmen group and the Sham group, and less anxious at 48 h (P = 0.042) as compared with patients in Shenmen group. Repeated-measures analysis of variance performed for electrodermal activity, blood pressure, and heart rate demonstrated no group differences (P = ns). We conclude that auricular acupuncture at the "relaxation" point can decrease the anxiety level in a population of healthy volunteers.