A Preliminary Study on the Efficacy of Danggui Shaoyao San and Cuscuta Chinensis in Patients with Primary Dysmenorrhea

Danggui Shaoyao San is a traditional Chinese medicine (TCM) formula used to regulate blood flow, alleviate pain, and reduce inflammation. Participants in this arm will receive DSS starting 3 to 7 days before menstruation and continue until 3 days after menstruation for two cycles.

Cuscuta Chinensis is a TCM formula traditionally used to nourish kidney essence and improve menstrual health. Participants in this arm will receive Tu Si Zi starting 3 to 7 days before menstruation and continue until 3 days after menstruation for two cycles.

This intervention combines Danggui Shaoyao San and Cuscuta Chinensis. Participants will receive both formulas starting 3 to 7 days before menstruation and continue until 3 days after menstruation for two cycles.

Participants in this arm will receive a placebo that matches the appearance of the study medications. The placebo will be administered on the same schedule as the active treatments for two menstrual cycles.