Acupuncture for Post-Traumatic Stress Disorder in Combat Veterans: Randomized Clinical Trial Published in JAMA Psychiatry

Post-traumatic stress disorder (PTSD) in combat veterans represents one of the largest challenges of military medicine and global public health. Available therapies — prolonged exposure psychotherapy, eye movement desensitization and reprocessing (EMDR), and pharmacotherapy with SSRIs — are effective, but face important limitations: high dropout rates, side effects that compromise adherence, and a significant fraction of patients who do not respond adequately. A randomized clinical trial published in June 2024 in JAMA Psychiatry — one of the highest-impact psychiatry journals in the world — offers a new path: medical acupuncture, rigorously tested in combat veterans with confirmed PTSD, demonstrated a large-magnitude effect on symptom reduction and objectively altered the psychobiology of trauma.

The study was conducted by Dr. Michael Hollifield and colleagues at the Tibor Rubin VA Medical Center in Long Beach, California, with the participation of researchers from Wayne State University, UC Irvine, and centers specialized in acupuncture. Recruitment occurred between April 2018 and May 2022, with a 15-week treatment period. Funding was from the Veterans Health Administration (grant 5I01CX001416-02), with no participation of the sponsors in the analysis or publication of the data. It is a superiority trial with two parallel arms (real acupuncture vs. sham acupuncture), prospective and with active blinding of participants — the methodological standard required by the most demanding journals in psychiatry.

Study Design: Rigorous Protocol in a Real VA Setting

The 93 participants were adult combat veterans (18–55 years) with a DSM-5 diagnosis of PTSD confirmed by the Clinician-Administered PTSD Scale-5 (CAPS-5, score ≥26) and a combat-related criterion A event. Participants with conditions that interfered with the outcomes or with biological assessment were excluded. The groups were balanced in combat exposure, service preparation, education level, employment, and income — ensuring clinical comparability. Of the 93 randomized, 71 (76.3%) completed the intervention protocols.

The real acupuncture protocol included 24 sessions of 1 hour over 15 weeks (twice a week). Each session consisted of a 10-minute interview, pulse and tongue assessment (5 minutes), needle insertion with deqi searching (10 minutes), 30-minute retention, and needle removal (5 minutes). Acupoints varied between 11 supine points and 14 prone points, selected according to traditional Chinese medicine patterns for PTSD. Up to 3 additional discretionary points per session; mixed-frequency 2/100 Hz electrostimulation. Sham acupuncture used superficial insertion (<0.25 inches), positioning 2 cm lateral or medial to the reference points, and a sham stimulator (flashing light without electrical current) — without deqi searching.

The Decisive Finding: Extinction of Conditioned Fear

The most clinically revealing result of the trial is not the CAPS-5 — it is the objective assessment of extinction of conditioned fear by ocular electromyography. Conditioned fear is the central psychobiological substrate of PTSD: the brain learns to associate neutral stimuli with threats and starts to respond with exaggerated startle even in the face of non-dangerous triggers. Therapies that only suppress symptoms do not necessarily correct this neural mechanism; therapies that produce genuine extinction alter the amygdala–prefrontal cortex circuit in a more durable way.

In the trial, 63 participants completed conditioning assessment and 54 completed extinction. The results were unequivocal: real acupuncture significantly reduced the fear-potentiated startle response during extinction (F₅₃=7.47; partial η²=0.13; P=0.009), while sham showed no significant alteration. In direct between-group comparison post-treatment, real acupuncture demonstrated better extinction than sham (F₅₃=7.42; P=0.009). The mean change in the acupuncture group was -55.8 units vs. +6.1 in sham. And further: the negative correlation between PTSD reduction and improvement in fear extinction (r=-0.31; 95% CI -0.53 to -0.06; P=0.02) indicates that the psychobiological mechanism and clinical improvement go together — evidence that the effect is not superficial.