insomnia
"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'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."