how much does caffeine raise blood pressure?
<answer> Two American cups of coffee can raise your systolic blood pressure 3 to 14 mm Hg. <context> Most studies show the amount of caffeine in two American cups of coffee (about 8 ounces each) can raise your systolic blood pressure 3 to 14 mm Hg and diastolic blood pressure 4 to 13 mm Hg, at least in the short term. One study does show much lower numbers, but an increase is associated nonetheless. Photo by Bernand Goldbach.