I've been on Valium, Xanax, Xanax ER and Klonopin. I currently take 2 mg of Xanax ER each day and when I have panic attacks or a lot of anxiety I take Valium .prn. Regular Xanax did nothing for me and Klonopin takes a little longer to kick in. The withdrawal from Xanax is really rough and you have to taper down carefully.