Acupuncture for Cancer Pain and Related Symptoms

This comprehensive review examines the use of acupuncture in the management of cancer-related pain, a condition that affects between 40% and 85% of oncology patients. The authors, from Harvard Medical School and Dana-Farber Cancer Institute, present evidence that acupuncture can be a valuable tool as adjunctive therapy in the treatment of cancer pain. Cancer pain has two main origins: 75% related to the tumor itself and 25% to anticancer treatments such as surgery, chemotherapy, and radiation therapy. Acupuncture, a millennia-old Chinese technique that uses fine needles at specific points of the body, has gained recognition in integrative oncology.

The National Comprehensive Cancer Network (NCCN) guidelines already recommend acupuncture as one of the integrative interventions in combination with pharmacologic treatment when necessary. The review analyzes multiple randomized controlled trials that investigated different applications of acupuncture in oncology. For postoperative pain, studies demonstrated that acupuncture can reduce opioid consumption by up to 29% in the first 72 hours after surgery, in addition to decreasing side effects such as nausea (33% reduction), dizziness (35%), and itching (25%). A study with 138 patients undergoing oncologic surgery showed that acupuncture combined with massage significantly reduced pain and depressive mood compared with usual care.

For postoperative nausea and vomiting, stimulation of the PC-6 point (located on the wrist) proved effective in multiple studies. A Cochrane review with 4,858 patients demonstrated significant reduction in both nausea (29%) and vomiting (30%) when compared with placebo control. Acupuncture has also shown promise for opioid side effects. A study with 66 oncology patients with morphine-induced constipation showed a 97% recovery rate with electroacupuncture, comparable to conventional medications but without adverse effects.

For chemotherapy-induced neuropathy, which affects up to 76% of patients, preliminary studies suggest that acupuncture can improve nerve conduction and reduce painful symptoms. A particularly interesting study used auricular implants and demonstrated a 36% reduction in pain intensity after only two sessions. For joint pain associated with aromatase inhibitors in women with breast cancer, a randomized study of 43 patients showed significant improvement in pain (from 5.5 to 3.0 on a 10-point scale) and functional interference. Patients with chronic pain after neck dissection also benefited, with improvement maintained even years after surgery.

The authors emphasize that oncology acupuncture requires knowledge of both acupuncture and oncology, given that patients with cancer present complex conditions and multiple simultaneous manifestations. Timing of application is crucial: for severe pain (>7/10), combination with opioids is recommended; for mild pain (0-3/10), acupuncture alone may be sufficient; for moderate pain (4-6/10), both approaches can be considered. The review provides detailed protocols for different conditions, including specific points, frequency, and duration of treatments. These evidence-based protocols offer practical guidance for clinicians who want to incorporate acupuncture into oncologic care.

The evidence suggests that acupuncture is safe and effective as adjunctive treatment for various aspects of cancer-related pain, from the postoperative period to long-term chronic symptoms.