Can you tell me more about it? I'm curious about this stuff.
I don't know much more than wikipedia could tell you, medically, but I can tell you some people think it's total bunk, others say it works great.
I found it to be a nice "motivator," i.e. it's worthless if you want to stay up anyway, because you don't feel "drowsy" the way doxylamine and diphenhydramine make you feel when you first take them, so you can push right through it. It just makes it easier to get started sleeping when I'm ready, for me. It also reminds me that I want to be sleeping, and not up doing something else, because I took it. But a sugar pill would probably serve the same purpose in that case.
Take less of it. I sometimes take as little as 0.75 mg.
I might try this, but I need something to really push me in the right direction, and even 3mg tabs of melatonin doesn't quite get me where I need to be to get started into sleep mode, and still leaves me groggy.