I was also put on Effexor for migraine treatment. I have been on 150mg for about 2 years. I stopped taking it on my own about 3 weeks ago and am misreable! I've experienced nausea, vomiting, fatigue, abdominal cramping, and horrible hot flashes. I have now decided to go to my doctor to get off the other two daily meds he has put me on. Hopefully it won't be as bad. Thanks to everyone who posted on this site...it helped me to see that it was the Effexor causing these problems.