Generally speaking, the normal oral dose of Nifedipine extended-release tablets is 20mg twice a day, with a maximum recommended dose of 60mg three times a day, or a combination of other types of antihypertensive drugs if blood pressure is still not reduced to normal. The recommended medication for lowering blood pressure is smooth antihypertensive, nifedipine extended-release tablets can be taken orally 2-3 times a day to achieve effective blood concentration for smooth antihypertensive, and if blood pressure is still not well controlled, long-acting drugs such as Irbesartan, Valsartan or Enalapril can be chosen for antihypertensive treatment. Patients with hypertension generally have their blood pressure controlled at 140/90 mmHg or less, and if combined with diabetes or renal insufficiency, it is recommended to control blood pressure at 130/80 mmHg or less.