There's a lot of info out there on clonazepam.....Please use the search engine or check the OD directory before starting a new thread for basic questions like this...
if you've never taken clonazepam before, 4 mgs would likely "knock you on your ass" and cause you to fall asleep for several hours. If you're new to it, .5-1.0 mgs would be a more functional recreational dose...