The evidence supporting the use of Chinese herbal medicine (CHM) for primary dysmenorrhoea is promising, but better quality research on the subject is still required. These are the conclusions of a systematic review by Australian researchers, which included 39 RCTs involving a total of 3475 women. CHM was found to result in significant improvements in pain relief, overall symptoms and use of additional medication when compared with use of pharmaceutical drugs. CHM also resulted in better pain relief than either acupuncture or heat compression in the studies analysed. There were no indications that CHM caused any adverse events.

Chinese herbal medicine for primary dysmenorrhoea. Cochrane Database Syst Rev. 2007 Oct 17;(4):CD005288