Nicorandil Tablet side effects will disappear in about 1 to 2 days, depending on the patient’s individual constitution. Nicorandil Tablet generally has side effects such as headache, dizziness, tinnitus, insomnia, nausea, vomiting, and indigestion. The side effects of the drug will disappear more quickly in people who are in better physical condition. Side effects last longer in people who are old and frail and have many underlying medical conditions. It takes 1 to 2 days for side effects to go away in most patients. Patients taking the drug, if the side effects are more pronounced and cannot be tolerated, then the drug can be stopped immediately and replaced with other drugs for treatment according to the doctor’s instructions. The drug is used for the treatment of coronary heart disease, angina pectoris. It is contraindicated in patients with glaucoma. It is contraindicated in patients with severe liver and kidney diseases. It is contraindicated for those who are allergic to the product. This product is a prescription drug and should be taken together under the guidance of a doctor.