Acupuncture for functional dyspepsia

This Cochrane systematic review analyzed the efficacy and safety of manual acupuncture and electroacupuncture in the treatment of functional dyspepsia, a common gastrointestinal condition characterized by symptoms such as postprandial fullness, early satiety, epigastric pain, and burning, without evidence of structural disease. Functional dyspepsia affects between 11% and 29% of the world's population and represents a significant therapeutic challenge, as conventional treatments often have limited efficacy and undesirable adverse effects. The investigators conducted a comprehensive search of multiple databases, including MEDLINE, EMBASE, CENTRAL, and Chinese databases such as CNKI and CBMdisc, identifying 681 initial citations. After rigorous selection, seven randomized clinical trials were included, involving 542 participants (212 men and 330 women), all from Asian populations.

The studies compared manual acupuncture or electroacupuncture with conventional medications (cisapride, domperidone, itopride) or sham acupuncture. The most commonly used acupuncture points included ST-36 (Zusanli), CV-12 (Zhongwan), PC-6 (Neiguan), LI-4 (Hegu), among other points traditionally indicated for gastrointestinal disorders. Treatments lasted 2 to 4 weeks, with sessions performed 3 to 5 times per week. Main results showed that there were no statistically significant differences between acupuncture and conventional medications in reducing functional dyspepsia symptom scores.

However, when compared with sham acupuncture, true acupuncture demonstrated consistent superiority in improving symptom scores, quality of life (measured by SF-36), and reducing anxiety and depression. Particularly notable was the finding that acupuncture had significantly fewer adverse effects compared with cisapride, suggesting a superior safety profile. The quality assessment revealed important methodologic limitations, mainly related to the difficulty of blinding in acupuncture studies and inadequate descriptions of allocation concealment. Using the GRADE system, almost all evidence was classified as low or very low quality, meaning that future research is likely to substantially modify effect estimates.

The clinical implications of this review are moderate but promising. Although current evidence does not allow robust conclusions about the superiority of acupuncture, the results suggest that it may be a viable therapeutic option for patients with functional dyspepsia, especially given its favorable safety profile. Consistent results in studies compared with sham acupuncture suggest specific effects beyond placebo. Limitations include the predominance of Asian studies, which may limit generalizability to other populations, and heterogeneity in the acupuncture techniques used.

The inherent difficulty of conducting double-blind studies in acupuncture represents an ongoing methodologic challenge in the field. For clinical practice, these findings support the use of acupuncture as a complementary or alternative treatment for functional dyspepsia, especially in patients who do not respond adequately or who experience adverse effects with conventional medications. Nevertheless, higher methodologic-quality studies, with larger samples and longer follow-up, are needed to definitively establish the role of acupuncture in the management of functional dyspepsia.