I have been taking xanax .25 for 6 weeks , at first it seemed to do the job, it helped me sleep it made alot of my anxiety disappear and I stopped feeling so edgy and jumpy. Now its almost like I have a tolerence to it. It doesnt seem to be helping at all. I have all those problems again. I heard that valium also helps with the symptoms of PTSD. Is that true? Does anyone have any success stories? Thanks for all replies...............................................