I am a breast cancer survivor for 8 years now; I have severe hot flashes; every 45 minutes day and night; it has totally affected my quality of life...and ability to sleep; I recently found out I could take this drug. I am on 200 mg nightly; so far I have been waking up and had insomnia; will this get better and go away; I have only taken it for two nights; also how long does it take before one might notice their hot flashes have decrease? My dr. said I might have to go up to 400 mg. I also use an estrogen cream vaginally but it really never has helped the hot flashes just the tissue; I am hopeful this will improve my mood, decrease hot flashes and help me sleep; has it helped others? How long do I wait before I see results?