Felodipine belongs to the calcium antagonist class of antihypertensive drugs and is mainly used for the treatment of hypertension. For patients with hypertension must be taken regularly for a long time, as to how long and what dose, must be taken and used in a regular medical institution under the guidance of a professional doctor. The following adverse reactions may occur: flushing, headache, dizziness, palpitations, etc. Of course, some patients may experience hypotension and bradycardia if they overdose. If these reactions occur, the drug must be discontinued in a timely manner, and then go to a regular medical institution under the guidance of a doctor to adjust the medication, or to carry out some other standardized treatment, choose other drugs to better and more effective control of blood pressure.