In patients with hypertension (high blood pressure [BP]), a BP reading taken at an outpatient visit is usually used to decide if the dose of hypertension medication needs to be increased. However, there is concern that BP readings may be higher when visiting a health care provider because patients are anxious, also known as “white-coat” hypertension. There is no agreement about the best place to measure BP in patients receiving treatment for hypertension, how often to measure it, or how many high readings should occur before hypertension medication is increased.