Acupuncture for anxiety and anxiety disorders – a systematic literature review

This systematic review, conducted by British researchers, represents a comprehensive analysis of the scientific evidence on the use of acupuncture in the treatment of anxiety and anxiety disorders. The research was motivated by the high prevalence of these disorders and the growing demand for complementary therapies for mental health conditions. The researchers conducted systematic searches in major biomedical databases between February and July 2004, including MEDLINE, EMBASE, PsycINFO, and others, without language restrictions. Of the 919 records initially identified, only 12 controlled studies met the inclusion criteria: 10 randomized clinical trials and 2 non-randomized controlled studies.

The studies were divided into two main categories: four trials focused on generalized anxiety disorder or anxiety neurosis, while six investigated situational anxiety, particularly in the perioperative period. Notably, no specific studies were found for panic disorder, phobias, or obsessive-compulsive disorder. For generalized anxiety disorder, the results were mixed but encouraging. A well-designed German study by Eich et al.

demonstrated that body acupuncture at five specific points (including Baihui, Shenmen, and Neiguan) was significantly superior to sham acupuncture after 10 sessions, with a response rate of 60.7% versus 21.4%. Two Chinese studies compared acupuncture with antidepressant medications, finding no significant differences between the treatments, which may indicate therapeutic equivalence or statistical insufficiency of the studies. The most consistent results emerged from studies on perioperative anxiety. Six trials primarily investigated auricular acupuncture for anxiety before surgical procedures.

Wang and colleagues conducted multiple studies demonstrating that auricular acupuncture at specific relaxation points significantly reduced anxiety in both health professionals and patients and their family members. A particularly well-designed study involved 67 mother-child pairs, showing that auricular acupuncture in mothers reduced both maternal and child anxiety before surgery. The methodological quality of the studies varied considerably. Studies on situational anxiety generally had better methodological design, with adequate randomization and validated outcome measures such as the State-Trait Anxiety Inventory (STAI).

However, blinding remained a significant challenge, as it is practically impossible to completely blind acupuncture interventions. The acupuncture points used varied among studies, reflecting different theoretical approaches. Frequently used points included Baihui (GV-20) to calm the mind, Shenmen (HT-7) to regulate the heart and anxiety, Neiguan (PC-6) to calm the spirit, and various auricular points related to relaxation and tranquilization. The duration of treatments ranged from single sessions to 30 sessions distributed over several weeks.

The limitations identified include significant heterogeneity among the studies regarding types of intervention, populations studied, and outcome measures used. Many Chinese studies lacked essential methodological details and used local diagnostic criteria not always aligned with international standards. Some studies combined acupuncture with other therapies, making it difficult to attribute benefits specifically to acupuncture. The clinical implications suggest that acupuncture, especially auricular acupuncture, may be a safe and potentially effective intervention for situational anxiety, such as preoperative anxiety.

For generalized anxiety disorder, although the results are promising, the current evidence remains insufficient for definitive recommendations. The authors emphasize the need for future studies with better methodological design, adequately sized samples, standardized acupuncture protocols, and long-term follow-up to definitively establish the role of acupuncture in the treatment of anxiety disorders.