I have always taken generic klonopin. My gyn dr initially gave it to me for sleep some 6-7 yrs ago. For some reason, this practice tends to give this to woman but don't tell them it can be addictive. I have used it on and off for sleep especially when I have pain. Never go cold turkey once you take this regularly as you have to wean off. Any way, if I take .5 I sleep. Last nite, I took 1/2 tablet and was up till 2 am. After all the yrs, of taking it .5 still puts me under pretty good. It can fatigue you in the am. I usually have blurry vision when I wake up.