With the arrival of socio-economic development and general aging of the population in China, the incidence of hypertension in the elderly has increased substantially, and with the development of medical technology, a wide variety of antihypertensive drugs have emerged, so it is important to understand the medication monitoring of hypertension in the elderly. First, we need to understand the pattern of blood pressure changes. It is well known that most elderly people have a diurnal pattern of blood pressure changes, that is, the day rises and the night falls. Blood pressure rises after physical activity and sympathetic excitation (e.g., emotional excitement). Moreover, most elderly patients with hypertension have a significant increase in blood pressure in the morning after activity, that is, the highest blood pressure during the day should be in the 6:00 ~ 11:00. After taking antihypertensive drugs in the morning, blood pressure decreases after getting up from a nap, with the increase in activity and the metabolic decay of antihypertensive drugs in the body, blood pressure will rise again from about 16:00. At night, blood pressure decreases physiologically with parasympathetic excitation and after sleep, and drops to the lowest point at midnight. That is, the law of diurnal blood pressure change is: 6:00 ~ 11:00 or so and 16:00 ~ 19:00 blood pressure at the peak, while 12:00 ~ 15:00 or so, 21:00 ~ 5:00 blood pressure at the trough. According to the law of blood pressure changes, it is recommended that elderly patients with hypertension take their medication reasonably to keep their blood pressure at a constant level and prevent cardiovascular and cerebrovascular events from occurring. The medication should be given at 6:00, 15:00 and 20:00 to prevent strokes in elderly patients due to sudden rise in blood pressure after waking up and washing up, and to control the peak of blood pressure in the morning. 15:00 can not only effectively reduce the peak of blood pressure in the afternoon, but also replenish the medication in time to keep the blood concentration constant. At 20:00, it varies from person to person. Patients with significant diurnal blood pressure fluctuations should reduce the drug dose or take long-acting antihypertensive drugs appropriately, while patients with insignificant diurnal blood pressure fluctuations can take drugs earlier before bedtime to keep blood pressure relatively stable at night and prevent cardiovascular and cerebrovascular accidents from occurring in the late night when it is quiet. It is reasonable to measure blood pressure at 6:00 a.m., 12:30 a.m., 16:00 a.m., and before bedtime: 6:00 a.m. to understand the state of blood pressure and take morning antihypertensive drugs. 12:30 a.m. to understand the effect of antihypertensive drugs and the half-life of drugs, so as to prepare for the nap and prevent accidents. 16:00 a.m. to understand the peak blood pressure in the afternoon and to prepare for taking drugs. At 16:00, blood pressure is taken to know the peak blood pressure in the afternoon and to prepare for taking medication. It is necessary to take blood pressure before bedtime to provide a basis for taking antihypertensive medication at night and also to make patients have a good idea of their blood pressure at night to prevent accidents. The elderly with hypertension, in addition to regular medication, should pay attention to maintain physical and mental health, reasonable diet, avoid strong spleen angry heart, over-eating fat and sweet. When taking drugs, pay attention to the instructions and precautions, and prohibit the combination with certain drinks and foods that affect the antihypertensive effect of drugs. The elderly should have their blood pressure, ECG, liver and kidney functions, and blood lipids checked regularly after taking antihypertensive drugs because of the declining function of their organs and blood pressure regulation. Understanding the function of the heart, liver, kidneys and other important organs and the progress of blood pressure will help doctors to formulate prevention and treatment plans. After blood pressure is controlled and stabilized, medication should not be stopped at will, and the dose and type of medication can be changed reasonably according to the measured value and examination results, etc. It must be clearly understood that hypertension can only be controlled by medication, not cured by medication.