hi yuki
About the bai feng pills, i ever check with my chinese doctor, he said no problem, but of course brew dang gui is better.
I use to take bai feng pills when I was in my teens, but only once a month or sometimes few months once.
I use to have very bad cramp, pain until I can faint, and very light flow. So I begin to eat bai feng pills and dang gui on a more regular basic, my pain has reduce greatlly, flow is more, about 3 days.
According to a TCM in China, he said having clot during our menses are not good, hormones are not good. I am not too sure about this! I used to have this problem, alot of blood clot. Is only I increase the dosage of my dang gui and bai feng pills, conditions improves!