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Triamterene is used alone or in combination with other medicines to treat high blood pressure (hypertension). High blood pressure adds to the workload of the heart and arteries. If it continues for a long time, the heart and arteries may not function properly.
Both high blood pressure, hypertension, and low blood pressure, hypotension, can lead to headaches. Your blood pressure may be higher or lower that what is considered normal but still be normal for you. The only way to establish your normal blood pressure is to monitor it frequently over time.