Paroxetine
"I took 40 mg of Paxil for about 2 years over 11 years ago for panic, anxiety and moderate depression.  It worked very well for me.  I did take Xanax while the Paxil was building up in my body.  After about 4 weeks I didn't need the Xanax any more.  About 6 weeks ago my anxiety and panic began to increase to a point I knew I needed help in addition to my exercise, healthy eating etc.  I went to my doctor to get Paxil.  I started on 10 mg for a week and had increased anxiety, which I controlled with 0.25 mg of Xanax once a day.  I went up to 20 mg on day 8 and had severe anxiety and bad thought for about 36 hours.  Suddenly, just like that it was all gone.  I now feel great!  Some side effects, but worth the sanity!"