Nicorandil is usually required to be taken for life, and the medication needs to be taken under a doctor’s supervision. Since coronary heart disease is a disease that cannot be completely cured, long-term oral Nicorandil treatment is required. Nicorandil can improve coronary microcirculation, can increase the blood supply of coronary arteries, clinical mainly used in the treatment of coronary heart disease. At the same time, Nicorandil will produce liver function abnormalities, thrombocytopenia, headache and dizziness, oral ulcers, gastrointestinal discomfort, tinnitus, rash and other adverse reactions, allergic to drug components, acute left heart failure, cardiogenic shock, pregnant women, patients with severe hepatic impairment is prohibited. Patients who experience any discomfort while taking Nicorandil need to stop taking the drug in time, and adjust the drug under the guidance of the doctor and according to the actual condition. Do not stop the drug on your own, so as not to cause adverse effects.