Boyd’s antihypertensive medication usually refers to felodipine extended-release tablets. When taken, they need to be swallowed with water in the morning and the tablets should not be broken, crushed or chewed. Felodipine extended-release tablets are more commonly used to treat conditions such as high blood pressure and stable angina. Patients in the drug treatment is mainly oral, the specific dosage needs to be combined with the individual physical fitness and the severity of the disease, under the guidance of the doctor to use the drug. However, when taking the drug, usually choose to swallow water in the morning, the tablets can not be broken, crushed or chewed, need to be swallowed whole, so felodipine extended-release tablets can not be swallowed in half, which will affect the effectiveness of the drug treatment. During treatment with the drug, patients may experience mild to moderate ankle edema, facial flushing, headache and other adverse reactions, decompensated heart failure, acute myocardial infarction, women in pregnancy, allergic to felodipine and any of the components of the product is prohibited. When using medication, you must strictly follow the doctor’s instructions and not blindly use the medication.