Nifedipine extended-release tablets two tablets a day blood pressure is still high, under the guidance of the doctor can increase the dose of the drug, or combined with other kinds of antihypertensive drugs treatment. Nifedipine extended-release tablets belong to the calcium antagonist, through the dilation of peripheral blood vessels to reduce blood pressure. Oral nifedipine extended-release tablets two tablets a day, to understand the specific dose of the drug, if the blood pressure level does not meet the standard, you can follow the doctor’s instructions to increase the dose of the drug. Oral nifedipine extended-release tablets to reach the maximum dose, if the blood pressure level is still not normal, you can add other mechanisms of action of the drug, such as valsartan, metoprolol and other drugs. Note that the adverse reactions of nifedipine extended-release tablets include edema of the lower extremities, constipation, tachycardia, facial flushing, etc. It is contraindicated for patients with allergy to the components of the drug, severe aortic stenosis, and patients who are taking rifampicin. Nifedipine treatment of blood pressure control is not good, it is necessary to promptly go to the hospital, under the guidance of the physician to adjust the treatment program.