NEVER drink coffee (I'm talking 2 or 3 cups) if you're on Concerta/Ritalin. There is no warning about it anywhere I've read about the reaction of combining the two, but I know from experiance that it is NOT GOOD.
Think increased heart rate, anxiousness, edginess, fidgetyness, skewed vision, etc.
all-in-all, quite similar to the negitive effects of
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