The antihypertensive drugs currently used in clinical practice have certain side effects, such as diuretics that can cause hypokalemia, beta-blockers that can cause bradycardia, weakness and chills in the extremities, calcium channel blockers that can cause flushing and edema, and angiotensin-converting enzyme inhibitors that can cause irritating dry cough and angioedema, the probability of side effects is not high, and some side effects, after they occur, do not have a significant impact on The probability of side effects is not high, and some side effects do not cause significant impact on patients and do not affect the continued use of antihypertensive drugs. If there are significant side effects, other drugs can be adjusted to lower the blood pressure. The purpose of blood pressure lowering is to keep blood pressure under control for a long time and to reduce the damage to heart, brain and kidney target organs as well as the complications of hypertension.