Gabapentin
"After surgical menopause a year ago, I had the hot flashes from hell, at least every 20-30 minutes plus night sweats and no sleep because of night sweats so I started taking estradiol and that eliminated all of it but I was getting really bad headaches and I gained some lbs so I stopped that and read up on other medications that could reduce or eliminate hot flashes and came upon gabapentin.  It helps a lot, I still get hot flashes but only a couple times a day and no more night sweats.  The only thing is I'm afraid of weight gain but sometimes you have to take the lesser of the to evils.  I take 200mg. at night and that seems to do the job.  Love it!"