I have had insomnia for a long time. I used to get maybe 3-4 hours sleep a night max. The doctor gave me ambiem, but after a while, a tolerance builds up and doesn't work. Then it's back and forth between that, benadryl, the advil pm, or unisom...but by God, don't mix them! Talk about weird stuff happening...night terrors, sleepwalking, strange stuff. Your best bet is good 'ole fashion exercise. A 3-5 mile walk or jog a day will definitely do it.