Agreed... I'd like to add that I didn't have other symptoms (like fever), just a congested and runny nose. I don't picture myself tripping / rolling if I'm not feeling well enough.
Our hypothesis, when we noticed the symptoms were gone the next day, was that vasoconstriction was the cause.
So I can't comment on E curing cold, but the substance we took (for which vasoconstriction has been noted as a side effect) did seem to have a positive effect on our congested and runny noses.
However, I wouldn't auto-medicate using this substance (or others with similar effects). It would seem inappropriate (and especially for such unbothering symptoms). :D