Nifedipine extended-release tablets are mainly administered orally, and are generally not administered sublingually, as this may affect the efficacy of the drug or cause adverse reactions. Nifedipine extended-release tablets belong to the calcium antagonist, clinically used for various types of hypertension and angina pectoris. The product is mainly used by oral administration, which produces a smoother antihypertensive effect, lasts longer and has fewer side effects. Sublingual administration of antihypertensive drugs, on the other hand, has an unstable rate of lowering blood pressure and obvious side effects, and is not used as a method of administering this product. Adverse effects of nifedipine extended-release tablets include headache, flushing, palpitations, loss of appetite, nausea, abdominal pain, gingival hyperplasia, etc. It is contraindicated for those who are allergic to this product and pregnant women. Please take it in the correct way according to the doctor’s prescription, do not blindly use the medicine by yourself.