I've just toughed it out. Night sweats started at 42. Went through the change in menstrual cycles and hot flashes and celebrated more than one year without one back in May, and not yet 50. (October, yea ;-| ) I had heard of natural stuff like St Johns Wort etc but didn't know about giving up sugar or uping the vitamin E.
Still have the occasional hot flash but not like before. My sister the advanced practice nurse tells me they continue with decreased frequency until death. That we lose the ability to cool quickly after becoming over-heated. She is better educated on this than I and at 13 years my senior, more personally experienced as well (lucky me!!). Told me it would take ten years but I started early (relatively, for someone with no medical issues) and finished quickly (8 years instead of 10).