Most patients with hypertension choose to take blood pressure-lowering medication in the early morning on an empty stomach. The main reason is that blood pressure will gradually increase in the early morning after patients with hypertension change from sleep to wakefulness, and most patients with hypertension have higher blood pressure during the day, but not at night. Therefore, taking blood pressure lowering medication in the early morning on an empty stomach can reduce the gradual increase of blood pressure after waking up as well as the increase of blood pressure during the day, which can make blood pressure get better control. However, some patients with hypertension do not have high blood pressure during the day but have elevated blood pressure at night, so they need to take blood pressure-lowering medication after dinner to control the elevated blood pressure at night so that their blood pressure can be better controlled.