This product is a film-coated tablet, 30 mg in pink and 60 mg in yellow, which appears whiteoff-white after coating removal. It is indicated for the long-term treatment of coronary heart disease, prevention of angiospastic and mixed angina, post-myocardial infarction treatment, and long-term treatment of chronic heart failure. Oral administration; the dose should be individualized and adjusted according to clinical development. The medication should be taken in the early morning. To avoid headaches, 30 mg once daily can be taken in the first 2-4 days. The normal dose is 60 mg once daily, which can be increased to 120 mg once daily if necessary.