Manual acupuncture versus sham acupuncture and usual care for prophylaxis of episodic migraine without aura: multicentre, randomised clinical trial

Migraine is a complex neurological condition that affects more than one billion people worldwide, causing intense pain, nausea, sensitivity to light and sound, and significantly impacting patients' quality of life. Despite available preventive medications, only 13% of migraine patients regularly use these medications, whether due to lack of efficacy, undesirable side effects, or medical contraindications. This situation creates an urgent need to explore alternative non-medication treatments that can offer effective and lasting relief for these patients.

Acupuncture has emerged as a promising option for migraine prevention, but the scientific evidence on its efficacy remains controversial. Previous studies frequently failed to demonstrate significant differences between true acupuncture and sham acupuncture, possibly due to study design problems, especially in creating an adequate placebo control. The main difficulty lies in creating a sham treatment that is psychologically convincing for the patient but does not produce real biological effects on the body.

The study in question was conducted between 2016 and 2018 in seven Chinese hospitals and involved 150 adult patients who had never received acupuncture and suffered from episodic migraine without aura. Participants were divided into three groups: one group received true manual acupuncture, another received sham acupuncture with needles that did not penetrate the skin, and the third group received only usual care. The treatment consisted of 20 30-minute sessions over eight weeks, with patient follow-up for 20 weeks total.

True manual acupuncture was applied at specific points traditionally used for headache, including points on the hands, feet, neck, and head. The acupuncturists manually manipulated the needles to induce the sensation called "de qi" (得气), described as tingling, heaviness, or warmth at the application site. The control group received special needles that, when pressed against the skin, created the sensation of penetration but actually retracted into the handle, not actually penetrating the skin. This methodological innovation was fundamental to ensuring that patients could not distinguish between real and sham treatment.

The results were impressive and statistically significant. During weeks 13 to 20 of the study, patients who received true manual acupuncture showed an average reduction of 3.5 to 3.9 migraine days per month, compared with 2.2 to 2.4 days in the sham acupuncture group. This difference of approximately 1.5 to 2 fewer migraine days per month may seem modest, but represents substantial relief for those suffering from this debilitating condition. In addition, the frequency of migraine attacks also decreased significantly in the true acupuncture group.

A particularly encouraging aspect of the results was their durability. The benefits of acupuncture not only persisted but actually increased over time, lasting at least 12 weeks after the end of treatment. This suggests that acupuncture may produce lasting changes in the neurological mechanisms responsible for migraine, offering prolonged relief with a relatively short course of treatment.

Patient quality of life also improved substantially. Those who received true acupuncture reported fewer limitations in their daily activities due to migraine, better sleep quality, and reduced pain intensity when episodes occurred. Notably, more than 80% of patients in the true acupuncture group experienced a reduction of at least 50% in migraine days, compared with only 18% in the usual-care group.

For patients and healthcare professionals, these results have important clinical implications. Manual acupuncture proved superior to both sham acupuncture and conventional care, with an excellent safety profile. Only five patients in the true acupuncture group reported minor adverse effects, such as small bleeding at the application site, and no serious adverse effects were observed. This contrasts favorably with many migraine preventive medications, which can cause significant side effects such as weight gain, fatigue, memory problems, or mood alterations.

The study offers hope especially for patients who do not respond well to medications, cannot tolerate them due to side effects, or prefer to avoid pharmacological treatments. Acupuncture may also be a valuable option for pregnant or breastfeeding women, who have limited options for safe medications for migraine prevention.

However, it is important to recognize the limitations of the study. The research was conducted exclusively in China with Chinese patients, and the generalization of the results to other populations needs to be confirmed. In addition, the study included only patients who had never received acupuncture before, which may have influenced the results. The follow-up period, although it showed lasting benefits, was relatively short, and long-term studies are needed to confirm the persistence of the effects.

Another aspect to consider is that all participants received guidance on lifestyle changes and migraine management as part of usual care, and had access to rescue medication when necessary. This means that acupuncture functioned as a complementary treatment, not a substitute, for conventional medical care.

In conclusion, this study provides robust evidence that manual acupuncture can be an effective and safe treatment for the prevention of episodic migraine. The results support the inclusion of acupuncture in migraine treatment guidelines and its consideration by health insurers as a valid therapeutic option. For patients seeking alternatives to medications or who have not been successful with conventional treatments, acupuncture offers a promising option that can provide significant and lasting relief, substantially improving quality of life and reducing the debilitating impact of this complex neurological condition.