I just had surgery and have been off diladed for a week so my sleep,has been messed up cause I have also quit drinking too. My doc gave me celexa and generic Xanax he said the Xanax should work till the celexa kicks in so its sort term. He prescribed me .5 mg and,said it was strong and to try half first. A full .5mg doesn't even make me sleepy I'm still up till 3am. He said it should knock me out. I'm tiny I'm only 126lbs. Afte surgery they were giving me diladed and Valium and it knocked me out in the hospital. After getting home the diladed didn't even help my pain.did this somehow mess up my tolerance and now I have to take more Xanax? I would hate to run out of the Xanax before the celexa kicks in but I'm exhausted and really need to sleep. Not trying to abuse it but it doesn't do anything for me at all not even the calmness.