Sleeplessness is usually a problem of hormones, in particular, a loss of production of melatonin. Melatonin is produced by your body. It is the time to go to bed hormone that makes you sleepy.
You can purchase Melatonin in different strengths at any health food shop or even at your local Walmart. The problems presented are, you don't know how much you need to fall asleep, and too much can lead to other problems, and the form of melatonin you buy is man made, not natural. The best way to deal with this issue is to encourage your body to produce the amount it needs naturally.
Tryptophan is an amino acid, meaning that your body cannot produce it, so it has to be introduced through your diet. Foods like turkey have tryptophan in it, but you can't get large enough quantities of it to produce the desired effect. Tryptophan is not available in stores, but you can get a byproduct of it, which is 5-HTP. Tryptophan is metabolized by your body to produce 5-HTP, wich is 5 molecules of tryptophan combined as one, hence the term 5 hydroxy tryptophan.
5-HTP metabolizes into seratonin, the feel good hormone, which means that the more you take, the better you will feel. Large quantities can actually induce euphoria.
Your eyes send a signal to your brain at night that tells the brain that there is no sun out. Your brain then begins the process of converting seratonin into melatonin, and then night-night.
My wife suffers from sleepless nights. I find that 10 capsules does the trick quite nicely. There are no side effects from 5-HTP and you can't overdose from it. Your body simply disposes of what it does not use.
You can get it online. I found a sale at