The best time to take once-a-day antihypertensive medication should be determined by the patient’s blood pressure fluctuations and the medication taken that day, with most patients taking it at 7-8 a.m. Blood pressure fluctuations in normal people are highest at 9-11 a.m. and 3-6 p.m. and lowest at midnight. Different patients with hypertension may have different levels of blood fluctuations throughout the day. When taking antihypertensive medications, it is best to monitor the type of fluctuations a patient has, and the best time to take them is one hour before the highest blood pressure peak occurs during the day. In addition to the midnight blood pressure rise is more obvious, you should also try to avoid taking it at midnight to avoid causing hypotension. Most patients with hypertension have their blood pressure peaks in the morning, so they can choose to take their medication between 7-8 a.m. In addition, patients with hypertension should monitor their blood pressure fluctuations throughout the day to understand their own type of hypertension and then choose the time to take the medication, which will help to better control the hypertension situation.