My doc has me taking a .5mg tab before bed and half of a tab when a wake up. Since it makes me very sleepy i take the brunt of it b4 bed. I was asked if I wanted to try zanax to do away with the sleeiness but it only stays in your system for four hours she said. Last week was my first panic attack. Very unpleasant. Im affraid to switch because if the zanax wears off and I have another panic attack, that wont be good but if I stay on the klonopin, it will help with the stress and anxiety . . . . . .all day however it will make me tired. Can anyone give me any advise , ideas or suggestions please ?