Bupropion
"I have severe agoraphobia for 12 or so years. It's very hard to get outside. I have been on Prozac, Celexa, Zoloft, Paxil, Effexor and Buspirone. I have maxed out them all. Each one has stopped working so now I take Wellbutrin 150 twice a day, Buspirone 15mg 3 times and  Effexor 100mg 3 times a day. I was just taking Buspirone and Effexor and I still couldn't get outside. My doctor started me on Wellbutrin so now I take all 3 with no side effects. Took a few days for it to kick in now I can go out in yard to the store, but is still hard. But adding Wellbutrin helped a lot. I would recommend it if it doesn't help you can always go off it and try something else."