Drinking coffee can temporarily increase an individual's blood pressure, according to Mayo Clinic. People who already have high blood pressure can experience tightening of the arteries after drinking coffee, leading to increased blood pressure. Caffeine affects individuals differently, so people with hypertension should monitor their coffee intake.
Although caffeine can affect any individual's short-term blood pressure, men who are over 70 years of age or who are overweight are affected the most, claims Mayo Clinic. Caffeine may not greatly affect people who regularly drink coffee or caffeinated beverages because these individuals can have regular higher blood pressure. As a result of the various factors affecting blood pressure readings, more research and studies are needed to determine how caffeine affects people who do not regularly drink coffee, states WebMD.