Felodipine extended-release tablets and felodipine tablets are able to replace each other, but it is important to note that there are some differences in the usage of the drugs. Felodipine tablets belong to calcium antagonists, with vasodilatory effects, the main clinical indications are hypertension. Felodipine extended-release tablets are slow-release preparations that can be taken once a day, while felodipine tablets are ordinary tablets that need to be taken twice a day. Clinically, felodipine extended-release tablets and felodipine tablets can be substituted for each other, the mechanism of action and effect of the drug is basically the same, but pay attention to the use of the drug should be adjusted in a timely manner, according to the characteristics of the drug to choose the number of times per day, to ensure that the blood pressure level of the smooth. The adverse reactions of felodipine tablets include lower limb edema, dry stools, palpitations, flushing, etc. It is forbidden for patients who are allergic to the drug components or have severe hypotension. When felodipine extended-release tablets and felodipine tablets are substituted for each other, it is important to use the drug under the guidance of a doctor and choose the right dosage.