Nifedipine extended-release tablets are usually taken as one tablet 1 to 2 times a day, or as directed by your doctor. Nifedipine extended-release tablets are commonly used to treat high blood pressure and angina. It should be noted that during the period of taking it, there may be transient reactions, swelling of the feet and calves, occasional chest pain, blurred vision, flushing, headache, abdominal pain, nausea, constipation, loss of appetite and other adverse reactions. Also when taking nifedipine extended-release tablets should be swallowed carefully and avoid chewing. The dosage should be gradually reduced when the drug needs to be stopped, and the drug should not be terminated without doctor’s instruction. Caution should be exercised in patients with hypotension, hepatic insufficiency and aortic stenosis. It is also contraindicated for those who are allergic to nifedipine. Due to the adverse reactions associated with the use of nifedipine extended-release tablets, it should be used under the guidance of a doctor and avoid self-medication.