Melatonin
"I have had sleep problems for twenty years now due to pressure of work & probably a predispostion to insomnia. Have used various sleep aids benzodiazepines, diphenhydramine, etc. I am affected by both difficulty going to sleep & staying asleep. Recent reports concerning sleep aids & Alzheimers put me off using. Melatonin not implicated as far as I know so I have turned back to that!! Dosage 6mg slow release one hour before bedtime. As on previous occasions it is mild with no noticeable side effects. Worth a try!"