Will Drinking a Lot of Coffee Send Your Blood Pressure Up?

Caffeine in coffee as well as in other drinks, such as tea and sodas, only raises blood pressure temporarily. So you should be able to continue to have drinks that contain caffeine, unless you are sensitive to it or have heart disease and your doctor tells you not to have any.

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source: http://www.nhlbi.nih.gov/hbp/prevent/factors/coffee.htm