Shanghai Traditional Chinese Med Dayuanchuang Tech Co. Ltd.

To compare the efficacy and safety of modified Meijie tablets and placebo in the treatment of primary dysmenorrhea (Qi stagnation and blood stasis syndrome).

To preliminarily evaluate the efficacy and safety of Jiawei Meijie Tablets in the treatment of primary dysmenorrhea (Qi stagnation and blood stasis syndrome), explore the advantageous dose of Jiawei Meijie Tablets in the treatment of primary dysmenorrhea, and provide support for the next step of clinical research design.

To evaluate the efficacy and safety of Chang'an Granules in the treatment of diarrhea-predominant irritable bowel syndrome (liver depression and spleen deficiency syndrome) using placebo as a control, and to provide a basis for the design of Phase III clinical trials.