I still have anxiety in the mornings and have to take a .5 Xanax to get me through, how long does it take for Celexa to stop the anxiety in the mornings. I have dry mouth and headache so far with side affects. But in the mornings my heart beats fast and I can feel pin type needle feelings in my lower arms like tremors. I have been on this a long time ago and it was great. But forgot about how long it takes to work. I am taking it at night since I sleep ok on it.