I've been taking Venlafaxine HCR XR to treat my anxiety for about 7 months now. At first everything was fine and I definitely felt better, but the longer I take it, the more frequently I feel nervous for days on end for no reason. I know that anxiety itself can give you a nervous stomach for no apparent reason, but before I started taking this medicine, I never had such lengthy, severe episodes of random nervous stomach. It's awful. I know these are one of the possible side effects, but I was wondering if anyone else has had a similar experience? (I'm going to tell my doctor to see what I should do) (I'm also taking Buspirone HCL which can also cause this side effect.)