I am having withdrawl symptoms and when I had a panic attack the clozepam didnt touch it I still had a couple xanax left so I took one and it stopped the panic attack i have GAD and panic attacks is 0.5mg 2x a day of clozepam as strong as 3mg of xanax a day? the xanax hasn't been working as well as it did at first. I also have started having headaches with the clozepam I have only been on it a few days though I just feel tense and kinda weird.