Nicorandil is primarily used in the treatment of angina pectoris, a condition characterized by chest pain due to reduced blood flow to the heart. It works by dilating both the coronary arteries and the veins, improving blood supply to the heart muscle while reducing its workload. This dual action helps to alleviate symptoms of angina and prevent episodes of chest pain. Additionally, Nicorandil is sometimes used in the management of heart failure and has shown potential in protecting the heart during procedures like angioplasty. Its unique mechanism of action makes it a valuable option for patients who do not respond adequately to other anti-anginal medications.