... My anxiety is really high I'm scared of side affects & new drugs !!! I been taking Xanax 0.5 mg once at night for the past year at the beginning it was working fine help me sleep & calm me down... But lately it seems like I'm more agitated & when I take Xanax it only calms me down for a short time, so my Dr switch me to Klonopin I been hesitating about taking this new drug I don't like change & im scared of side effects !!!