F. Coffee and Smoking
Coffee is also known to stimulate the sympathetic nervous system and can cause mild elevation of blood pressure in susceptible individuals, especially if more than three cups per day are consumed. Tea has much less caffeine than coffee and is not known to increase blood pressure. Smoking definitely increases the cardiovascular risk in patients with hypertension. Also, many drugs do not work efficiently to lower blood pressure because smoking interferes with their metabolism in the liver. The patient must therefore be motivated to discontinue smoking cigarettes.

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