Fuyan pill is the invention of Dr.Lee from wuhan and she has spent over 30 years studying how to cure the diseases. The medicine has been patented and it patent number is 201110031968.You can go to the website for more information http://www.sipo.gov.cn. Fuyan pill has a powerful ability to kill the bateria in the reproductive organs, and it can also detoxify and be helpful for the blood circulation. Therefore, fuyan pill is very effective to regulate the menstrual period and relieve the pain.