Aren't adenosine receptors also part of the same pathways that opiates bond to?
That might explain the addictive nature of caffeine.

Stephen Beecroft wrote:

> -Ronn-
> >> (FWIW, I've been unable to find out why there is apparently no
> >> such compound as 1,7-trimethylxanthine.
> >
> > Oops.  I meant 1,7-dimethylxanthine . . .
>
> Also called "paraxanthine"; described as an adenosine receptor ligand
> and a major metabolite of caffeine at
>
> http://www.sigma-aldrich.com/rbi/datasheet/a005dat.pdf
>
> Stephen
>

--
Marc A. Schindler
Spruce Grove, Alberta, Canada -- Gateway to the Boreal Parkland

“Man will occasionally stumble over the truth, but most of the time he will pick
himself up and continue on” – Winston Churchill

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