Nortriptyline
"I have been migraine free for over a month now. I was getting 3-5 migraines a week with a continuous headache for 5 months straight and through the heat of the summer.  The migraines stopped after just a few days on the medicines and have not came back.  Even with the change of weather and congestion, the headache is not there.  I haven't noticed any side effects but it does make me sleepy.  Helps get a good nights rest."