Panic Disorde
"This medicine (Xanax) works effectively and quickly to resolve anxiety and panic attacks.  However, I found that after I went on the antidepressant Pristiq, the Xanax made me fall asleep.  I had to switch off of the Xanax as it was too sedating.  At this point, I have another benzodiazepine that I can use if I have to but Pristiq has been keeping most of my panic attacks away.  "