Nitrendipine tablets half a tablet in the morning and half a tablet in the evening is possible, but may not be able to lower blood pressure due to the dose is not up to the requirements of the poor effect, according to the blood pressure level of the dosage adjustment. Nitrendipine is a non-dihydropyridine calcium channel blocker, clinically mainly used in the treatment of hypertension, the specification is usually 10mg, in the use of the main oral, the dosage is initially recommended for 10mg / times, once a day, and then according to the blood pressure level of the dosage adjustments, the maximum dose of 20mg / times, twice a day. The main adverse effects of nilandipine are headache, dizziness, facial flushing, nausea, hypotension, edema of the ankles, anginal attacks, and transient hypotension. It is contraindicated in patients who are allergic to the components of the drug, as well as in patients with severe aortic stenosis. For the use of hypertension, it is necessary to select the appropriate drugs and dosage according to the condition under the guidance of a specialist, and make timely dosage adjustments according to the changes in blood pressure.