Perindopril Butylamine Tablets is a kind of antihypertensive drug, its specific dosage needs to be determined according to the patient’s own situation, usually taken once a day in the morning, before meals, the dosage is controlled at 4~8mg/day. Patients should take it under the guidance of the doctor, do not take the medicine by yourself. 1. When kidney function is normal: start from 4mg/day, and gradually increase to 8mg/day within three to four weeks according to the patient’s medication effect. If the treatment effect is not good, diuretics such as hydrochlorothiazide can be used in combination to further lower the blood pressure. 2. Renal dysfunction or the elderly: diuretics should be discontinued for the first three days of treatment and can be added gradually thereafter. Perindopril butylamine tablets can be started at 2mg/day and the dose adjusted according to the blood pressure lowering effect, and blood creatinine and blood potassium levels should be tested during the course of treatment. It is recommended to take the tablets under the supervision of a physician and to monitor renal function and other indicators.