I cut the zolpidem 10 mg into small pieces. With my sleep cycle, I wake up every two hours or so. I'll take a little piece and then-back to sleep. Works well (my version of Ambien CR). I do not take any after 8 hours of sleep. I have no side effects. There is tolerance, when I stop taking the medication, there are several sleepless nights. Sleep is important to restore the body, without it the risk of stroke, heart attack, and metabolic disorder increases dramatically, so it is valuable for sleep and health.