http://www.medications.com/effect/view/34038 i started on xanax .25mg for anxiety and stress for 1-week then i was given xanax xr 5mg and celexa 20mg 1/2 for 6 days, thereafter 20mg and let me tell you going to the 20mg i felt like a zombie, the next morning jittering, very sleepy and cranky, since th