If it has happened right when you started taking effexor and not before that, then it is probably a side effect of the medicine. Also, you have to take in account how long you have been on the medication. If you just started, that is when the side effects are most severe. If you have been taking this medication for a while, and it bothers you enough, I would switch medications. Talk to your doctor.
"Getting an idea should be like sitting down on a pin; it should make you jump up and do something." -E. L. Simpson
General Anxiety Disorder (GAD) with Agoraphobia
Zoloft (100 mgs) daily
Trazadone (50 mgs) nightly
Xanax (1.25 mgs) as needed at night