3mg is a megadose for me. If I want to use melatonin I have to take a 3mg tab and bite off a tiny granule of it, probably no more than .1 or .2 mg (and my 100% RDA of B6 right there, it's a mel/B6 combo pill), and go with that. If I take any more, I will wake up feeling shitheaded, even after (especially after?) 8-9 hours of sleep. It's not drowsiness per se, but something like zombification. I think that might be entirely the B6 overdose's effects, though.

As for the B6, whenever I take it in significant amounts (which is only when I take melatonin in drastic amounts, same pill), it shoots my dreams to hell. It's like taking a normal, perfectly decent dream and settling a hurricane down on top of it all night long. Just noise and static and meaningless jumbles... it's horrible. I really despise B6 as a dream aid.