Anxiety Support Group
Anxiety is a physical condition marked by intense and persistent feelings of distress, fear, angst or dread. General anxiety caused by routine day-to-day stresses usually passes quickly and is experienced by almost everyone at one time or another. However, such feelings that linger over time and are very difficult to cope with, and which lack a clear cause, may indicate...

http://www.mayoclinic.org/diseases-conditions/depression/expert-answers/antidepressants/faq-20057938
My doctor since has tried 2 new antidepressants Brintellix and Fetzima combining them with either lorazapam or clonazepam and none of it has worked.
I am now trying a new treatment that many have not heard of it's called TMS which stands for Transcranial Magnetic Stimulaton. I have posted the link below which contains 4 videos explaining TMS. You may want to look at it for information.
http://www.contemporarytms.com/
My doctor has told me that it really is a trial and error finding the right meds that will work for you. But don't give up there are tremendous amounts of antidepressants out there, it's just a matter of finding the right one for you. Hugs and good luck.
Please let me know.
http://www.contemporarycare.net/transcranialmagneticstimulation/
You'll see the below as the 2nd bullet item:
"TMS is also effective in a variety of other conditions (Please see Other Applications)"
Click on Other Applications and you'll see General Anxiety Disorder listed, which is what I've been diagnosed with. There also are many more listed there.
Hugs and good luck.
http://www.contemporarycare.net/neurostarTMSTherapy/other-applications-tms.php