Acupuncture and electroacupuncture for anxiety disorders: A systematic review of the clinical research

Acupuncture represents one of the most extensively studied practices of traditional Chinese medicine, based on the concept that health depends on the body's energetic balance through channels called meridians. This ancient therapy has been attracting growing interest in the West as an alternative treatment for various health problems, especially anxiety disorders. The reviewed study addresses an issue of great public health relevance: anxiety disorders are among the most common mental health problems worldwide and represent one of the leading causes of disability. Data from 2015 show that anxiety affects more than 60 million people in the European Union alone, with significant impacts on both personal life and social productivity.

When not adequately treated, anxiety can progress to more severe and complex conditions, generating high social and personal costs.

The researchers conducted a systematic review of the scientific literature with the goal of examining the effectiveness of acupuncture and electroacupuncture in the treatment of anxiety disorders. The study followed rigorous selection criteria, seeking only clinical trials in which anxiety was the primary treatment target, not a secondary symptom. The search was conducted between July and September 2017, using major scientific databases such as PubMed, ScienceDirect, and Scopus. The authors applied specific keywords combining terms related to anxiety and acupuncture, limiting the search to human studies published between 2007 and 2017 in English.

From an initial total of 1,135 articles identified, only 13 studies met the quality criteria and were included in the final analysis.

The results revealed encouraging findings regarding the therapeutic potential of acupuncture. All 13 selected studies demonstrated a significant reduction in anxiety levels in the acupuncture-treated groups compared with control groups. These positive results were consistent across studies conducted in different countries and cultures, suggesting that the effectiveness of acupuncture transcends geographic and cultural barriers. The analysis identified that the most frequently used acupoints were PC-6 (known as Neiguan), located on the wrist, EX-HN3 (Yintang), situated between the eyebrows, and HT-7 (Shenmen), on the wrist.

These points are traditionally associated with the treatment of emotional imbalances in Chinese medicine. Of the studies analyzed, eight used traditional body acupuncture, four employed auricular acupuncture (on the ear), and only one investigated electroacupuncture, a modern variation of the technique that uses mild electrical stimulation of the needles.

The clinical implications of these findings are particularly relevant given the limitations of conventional treatments for anxiety. Traditionally prescribed medications, such as benzodiazepines and antidepressants, frequently cause undesirable side effects, can lead to dependence, and have high relapse rates, especially in chronic anxiety cases. In contrast, the studies analyzed indicate that acupuncture offers therapeutic benefits with minimal adverse effects. Some researchers included biological measures to complement anxiety assessment questionnaires, finding improvements in parameters such as heart rate, immune function, and stress hormone levels.

This objective evidence reinforces the subjective reports of improvement provided by patients. For health professionals, these results suggest that acupuncture may be considered a valid therapeutic option, either as a stand-alone treatment in mild to moderate cases or as a complementary therapy to conventional treatments.

However, it is important to recognize the limitations identified in this review. The authors observed considerable variability in the methodologies used across the different studies, including differences in the acupoints selected, treatment duration, session frequency, and types of control groups. This methodological heterogeneity makes it difficult to establish standardized protocols for the treatment of anxiety with acupuncture. In addition, the search was limited to English-language publications, which may have excluded relevant studies in other languages.

Electroacupuncture, a promising modality, was poorly represented in the literature, with only one study of sufficient quality identified. The authors also emphasize the need for additional research using objective biological measures to complement questionnaire-based assessments, as well as studies with larger samples and more standardized methodologies.

In conclusion, this systematic review provides solid scientific evidence that acupuncture represents an effective and safe therapeutic alternative for the treatment of anxiety disorders. The consistently positive results found across different cultures and clinical settings support the integration of this ancient practice into modern health care. Nevertheless, the researchers emphasize the need for more studies with standardized methodologies to establish specific treatment protocols and to better understand the mechanisms of action of acupuncture on the nervous system. For patients seeking alternatives to conventional pharmacological treatments or who have experienced undesirable side effects, acupuncture emerges as a promising option that warrants serious consideration by patients and health professionals alike.