A July 2019 randomized clinical trial conducted by Chengdu University of Traditional Chinese Medicine studied the efficacy and safety of acupuncture adjunctive therapy to antianginal therapies in reducing the frequency of angina attacks. The study found that for chronic stable angina, “acupuncture on the acupoints in the disease-affected meridian significantly reduced the frequency of angina attacks compared with acupuncture on the acupoints on the non-affected meridian, sham acupuncture, and no acupuncture.”