Boydine is the trade name for felodipine extended-release tablets; nifedipine extended-release tablets are more favorable compared to felodipine extended-release tablets. Both drugs are in the same class of drugs, with nifedipine extended-release tablets being a medium-acting drug and felodipine extended-release tablets being a long-acting drug. Therefore, when comparing the two drugs, felodipine extended-release tablets are taken less often per day and thus have fewer side effects on the body. Therefore, clinically, it is generally considered that felodipine extended-release tablets are more advantageous. Nifedipine extended-release tablets are clinically used for the treatment of various types of angina pectoris and essential hypertension; while felodipine extended-release tablets are clinically used for the treatment of stable angina pectoris and hypertension. Adverse effects such as headache, nausea, flushing, and ankle edema have been reported after taking these drugs. Felodipine extended-release tablets are contraindicated in patients with acute myocardial infarction, pregnant women, and unstable angina; nifedipine extended-release tablets are contraindicated in patients with severe aortic stenosis, and those who have experienced cardiogenic shock. Both drugs should be swallowed with water, not crushed or chewed. If the drug is needed, it should be used under the guidance of a specialist.