"a half of a tablet gives me 4 hours of sleep.  one whole = 8 hours.  rarely do i have any after effects like drowsiness unless i was exceptionally tired.  

i use this very sparingly, all sleep aids can be psychologically habit forming even if not physically so.  only if i can&#039;t sleep for 3 or more days consecutively, or in periods of extreme stress.

tried many other products, only this one works great for me."