Melatonin is not easily obtainable here in the UK (as far as I know) so when I saw some in a regular store in the US, I grabbed some to try it.

And boy.. I usually have no trouble falling asleep except when travelling or otherwise "out of sync" so I tried it and I felt like I wanted to sleep almost constantly for two days. So it works, but perhaps a bit too well for me, even with a single tablet. Maybe I have an abundance of melatonin already coursing my veins? :-)