I have been on Lex for 3 weeks now. I had some teeth clenching in the beginning, but a .25mg Xanax took care of that. I was taking the Lex at night, and was having trouble sleeping. I switched to morning dosage, and still was waking one to two times a night. This week I have started taking two .25mg Xanax to help sleeping, but so far that hasn't been helping much. Can anyone give me advice on issue they had on Lex? Thanks!