There are more than three side effects of nifedipine. Long-term consumption of nifedipine can lead to side effects such as tachycardia, flushing, lower extremity edema, and gum enlargement. 1. Tachycardia: Nifedipine hinders the entry of calcium ions into cardiomyocytes and vascular smooth muscle cells for the purpose of dilating blood vessels and lowering blood pressure. At this time, the body will increase the heart rate to compensate for low blood pressure, resulting in tachycardia. 2. Flushing, lower extremity edema: nifedipine makes blood vessels dilate rapidly, and the blood vessels at the ends of the limbs retain a large amount of blood, which will lead to symptoms such as flushing, headache, lower extremity edema. 3. Gingival hyperplasia: some patients will have swollen and painful gums and gingival hyperplasia. Nifedipine is suitable for high blood pressure, angina and other diseases. Patients who are allergic to nifedipine are prohibited from using this drug. When the drug is used for antihypertensive treatment, it should be reviewed after taking it for a period of time, and the drug should be replaced in time if the preferred drug has poor efficacy or cannot be tolerated. It is recommended that patients standardize the use of drugs under the guidance of a doctor.