Blood pressure of 160mmHg can take a piece of nifedipine can not be sure whether good control, because of individual differences in the sensitivity of the drug is different. Nifedipine in the clinic has a variety of dosage forms, there are ordinary tablets, extended-release tablets and controlled-release tablets, different dosage forms may have a variety of different dosages, oral intake of a piece of nifedipine is not clear about the dosage and dosage form of the drug, different dosage forms of the drug may have significant differences. Nifedipine belongs to the calcium antagonist, has the effect of vasodilatation, patients with high blood pressure should start taking nifedipine in small doses, pay attention to monitor the changes in blood pressure during the course of the drug, patients with poor antihypertensive effect should gradually increase the dose. However, in order to maintain a smooth lowering of blood pressure, it is usually recommended to take oral nifedipine extended-release tablets and controlled-release tablets. Adverse effects of nifedipine include tachycardia, flushing, lower limb edema, dry stools, etc. It is contraindicated for patients who are allergic to the drug components, have severe aortic stenosis, or are on oral reserpine therapy. When patients with hypertension take oral nifedipine to treat blood pressure, they should use the drug under the guidance of a physician, choose the appropriate dosage and dosage form, and avoid purchasing the drug on their own.