Common side effects of Boydine, known generically as Felodipine Extended-Release Tablets, include peripheral edema, headache, and facial flushing. Felodipine extended-release tablets are calcium channel blockers and are indicated for hypertension and stable angina. Some patients taking felodipine extended-release tablets are prone to side effects such as peripheral edema, headache, and facial flushing. Among them, peripheral edema mostly occurs 2~3 weeks after the administration of the drug, and the degree of edema is usually mild and will not cause serious effects on patients. In addition to the above common side effects, a small number of patients may experience side effects such as body weakness, palpitations, dizziness, sensory abnormalities, skin rash, and gingival hyperplasia. For special people such as felodipine allergy, severe low blood pressure, aortic stenosis, etc., taking felodipine extended-release tablets is contraindicated to prevent aggravation of the condition. It is recommended that patients take felodipine extended-release tablets as prescribed by the doctor, and not to use the drug or adjust the dosage at will. Note that felodipine extended-release tablets need to be swallowed whole, avoid biting or chewing, in order to prevent the efficacy of the drug.