Nicorandil one tablet a day may affect the therapeutic effect, it is recommended to follow the doctor’s instructions to standardize the use of drugs. Nicorandil has the effect of dilating the coronary artery and increasing the blood supply to the coronary artery, which is suitable for the treatment of angina pectoris. The standard usage is three times a day, and the amount can be increased or decreased according to the severity of the disease. Pharmacological experiments show that the drug is almost completely metabolized after 8 hours in the blood, so one tablet a day may affect the therapeutic effect, it is recommended to follow the doctor’s instructions to standardize the use of drugs, do not adjust the dose. Nicorandil may cause dizziness and headache, nausea and vomiting, liver dysfunction, thrombocytopenia, ulcers and other adverse reactions, is prohibited in allergy. If the symptoms of angina pectoris do not improve well after using the drug or adverse reactions need to stop the drug and consult a doctor.