Nicorandil’s main effect is to dilate coronary arteries, the main clinical indications are coronary angina pectoris. Nicorandil belongs to the role of potassium ions in the vasodilator drugs, the expansion of the coronary arteries is more obvious, can increase the blood supply of the coronary arteries, clinically mainly used in coronary heart disease angina pectoris patients treatment. Nicorandil belongs to the western prescription drugs, the process of taking drugs may appear headache dizziness, gastrointestinal discomfort, liver function impairment and other adverse reactions, allergic to the drug components, patients with glaucoma, cardiogenic shock, left heart failure patients are prohibited. Nicorandil should be taken under the guidance of a physician, choose the appropriate dosage, and pay attention to the indications and contraindications in the process of taking the drug.