I was having hot flashes all night and, to a lesser extent, during the day for several weeks in a row. Black Cohosh 540 mg, taken twice a day with breakfast and dinner, decreased my hot flashes immediately by about 80%.
My hot flashes became "warm" flashes. But even the warm flashes were waking me up several times a night, and if I wasn't overheating, I was freezing.
So I added a generic menopause supplement twice a day containing Damiana, Black currant seed oil, Chasteberry, Dong Quai, Wild Yam, Black Cohosh and Ginkgo bilobba plus Evening Primrose Oil 80mg twice a day.
That's a lot, I know! But my body temperature completely corrected itself immediately. 100%. My body's thermostat is working properly again. I sleep better, although still waking up - just not due to body temperature any more.
Black Cohosh - Oddly enough, it was something that my M.D. recommended for night sweats, and it worked!