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A member asked:
I had one cup of coffee and a 20oz coke. my hr is 92 bpm. normal for me is 70-80. would having another cup further raise my hr. when should be concern?
A doctor has provided 1 answer
Use common sense: one cup of coffee has about 80mg of caffeine. 20 oz of diet coke has 71 mg in 20 oz. for your age a tachycardia would be above 100. If you space out the drinks you can just use common sense. If you feel jittery then any amount is too much.
Answered 12/1/2014
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