A member asked:

I had an americano and when i was on the bus, my heart rate ws rapid and i had a warming feeling in my chest. my stomach was irritated also. common?

A doctor has provided 1 answer

Caffeine reaction: Even though you may have had an americano under the exact same set if circumstances before this particular time it sounds like your body reacted to caffeine stimulus. Try it again under different circumstances, say empty stomach, full stomach, double or triple shot, decaf, etc. If you're reacting more and more then you're becoming sensitive to caffeine effects.

Answered 12/21/2013

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