Cilnidipine is a third-generation dihydropyridine calcium antagonist, which has the effect of dilating vascular smooth muscle and lowering blood pressure, and is a widely used antihypertensive drug for the treatment of hypertensive patients. The initial dose is 5 mg once a day after breakfast, and the maximum dose can be increased to 10 mg once a day, starting with small doses in elderly patients, and with caution in patients with hepatic and renal insufficiency. Adverse reactions include edema of the ankles, flushing, panic, dysuria, muscle pain, headache, dizziness, etc. It is contraindicated in pregnant women. There is no information on the use of this product in children, and its use in children is not recommended. It is not recommended for use in children because it can cause symptoms such as low blood pressure, so it should not be used when working at height, driving a motor vehicle or operating machinery. This product is a prescription drug and should be read carefully and used under the supervision of a physician or pharmacist. Since sudden discontinuation of the drug may cause deterioration of the condition, the dosage should be gradually reduced when it is necessary to discontinue the drug and under the guidance of a doctor or pharmacist.