How you prepare

No special preparations are usually needed for a blood pressure test. But the following steps may help your doctor get the most accurate measurement:

• Do not smoke, exercise or drink caffeinated beverages for 30 minutes to an hour before the test. Such activities increase your heart rate and blood pressure.
• Consider wearing a short-sleeved shirt so that the blood pressure cuff can be placed more easily around your arm.
• Relax in a chair for at least five minutes before the test.
• Tell your doctor about the medications you take. Some drugs may affect your blood pressure.