Acupuncture in Addiction Medicine: Its History, Evidence, and Possibilities

This review article examines the historical role, current scientific evidence, and future possibilities of acupuncture in the treatment of substance use disorders (SUDs). With 309 million people using illicit drugs globally in 2019 and more than 40 million Americans with SUDs, chemical dependence represents a public health crisis worsened by the COVID-19 pandemic. Acupuncture has emerged as a promising complementary therapy, especially given the limitations of conventional treatments. The NADA (National Acupuncture Detoxification Association) protocol, developed in the 1970s by Smith at the Lincoln Recovery Center, uses five specific auricular points and has been widely adopted in detoxification programs.

This protocol can be applied without needles, using seeds or magnetized beads, providing prolonged, noninvasive stimulation. Basic research, led by Han at Peking University, established that acupuncture stimulates the production and release of endogenous opioid peptides in the central nervous system. Studies have demonstrated that low-frequency electroacupuncture (2 Hz) increases enkephalin and endorphin levels, while high frequency (100 Hz) raises dynorphin. This modulation of endogenous opioids is fundamental to the treatment of dependence, providing relief of withdrawal symptoms and reduction of craving.

Animal studies provide robust evidence of the neurobiological mechanisms of acupuncture. Peripheral electrical stimulation accelerates recovery from morphological alterations in the ventral tegmental area in morphine-withdrawn rats, increasing the expression of BDNF (brain-derived neurotrophic factor). Acupuncture has been shown to reduce drug sensitization and substance-seeking behaviors through modulation of mesolimbic dopaminergic systems. In clinical practice, systematic reviews and meta-analyses show mixed but generally positive results.

Chen et al., analyzing 9 studies with 1,063 participants, concluded that acupuncture reduces withdrawal symptoms, including craving, insomnia, and depression. Grant et al., in a meta-analysis of 41 studies with 5,227 participants, identified significant differences favoring acupuncture for craving and anxiety. In the treatment of neonatal abstinence syndrome, pilot studies show promising results, with reduction in the need for rescue medications and shorter length of stay. A randomized clinical trial with 28 newborns demonstrated significant reduction in the duration of morphine therapy in the group treated with acupuncture.

Clinical applications extend beyond detoxification. The NADA protocol has been used in diverse settings, from outpatient clinics to therapeutic residences, proving effective for reducing the risk of relapse and improving adherence to drug-free programs. Acupuncture offers particular advantages for specific populations, such as adolescents and young adults, where fewer than 25% receive medication for opioid use disorder, and for older adults with comorbidities or drug interactions. Functional neuroimaging studies in humans corroborate laboratory findings, showing that acupuncture produces extensive deactivation of the limbic-paralimbic-neocortical system and reduces cue-induced brain activation by heroin in areas related to psychological craving.

Limitations of current evidence include heterogeneity of studies, variations in acupuncture practice, and questionable methodological quality in many investigations. Despite this, decades of successful clinical use of the NADA protocol and growing scientific evidence support the value of acupuncture as an adjuvant treatment. Government recognition is increasing, with the U.S. Department of Health and Human Services including acupuncture in the Pain Management Best Practices Inter-Agency Task Force Report, validating its utility and recommending expansion of insurance coverage for complementary therapies.