I was put on Effexxor in 2005 at a mild amount and now up to 300 mg a day. I recently found out that my Heart has a vascular ring and that has been my problem for breathing issues all these years. At first I was diagnosed with Asthma that I do not have about 15 years ago. The doctors assumed that I was having Anxiety attacks. Now I KNOW that I do not have Anxiety but I am on 300 mg of Exffexxor. I am going to wean myself off slowly. Can someone please describe to me their experience with anxiety... I never thought I had GAD in the first place!