Why not consider using Melatonin. Can be purchased over the counter in most countries, as it is usually listed as a "Food Supplement." Very similar to vitimins.
Does not have the addictive characteristics of other sleeping tablets and there appears to be some evidence that it is beneficial for your health over all.
Some say it doesn't work for them, but I find if you take it as directed it does help, the only side effect I have noticed is the amount of vivid dreams you can get from its use.
For Jet Lag - long haul flights, it seems to correct Circadian rhythms more quickly, when used at the end of a pattern and makes the transition from walking around the pad all night like a raging bear, to someone nice and pleasant, within a reasonable amount of time. Persistent jet lag is not good for family life.
I would like to know what others think of Melatonin and if they find it effective.