Does coffee affect blood pressure?

Summary: Drinking coffee immediately increases blood pressure, regardless of your caffeine tolerance. read more

Also, if you have high blood pressure, avoid caffeine right before activities that naturally increase your blood pressure, such as exercise, weightlifting or hard physical labor. To see if caffeine might be raising your blood pressure, check your blood pressure before drinking a cup of coffee or other caffeinated beverage and again 30 to 120 minutes afterward. read more

Caffeine's Effect on Blood Pressure From the WebMD Archives May 17, 2002 -- The caffeine jolt of a java fix may cause a jump in blood pressure-- a particular problem in people who already have high blood pressure. read more