Nicorandil micro-pump rate is 2 to 6 mg/hour, and dosing should be evaluated and directed by a physician. 1. Nicorandil has the effect of dilating coronary arteries, increasing coronary blood flow and relieving coronary spasm, and is suitable for the treatment of unstable angina pectoris. 2. It should be dissolved in 0.9% saline or 5% dextrose solution to achieve a concentration of 0.01% to 0.03%. The starting dose for intravenous micro pump pumping is 2mg/hour, adjusted according to the condition, the maximum dose does not exceed 6mg/hour. 3. Nicorandil may cause headache, liver function abnormalities, decreased blood pressure, thrombocytopenia and other adverse reactions. 4. It should not be used in pregnant women and nursing mothers, and is contraindicated in patients with severe hepatic or renal dysfunction, cardiogenic shock, severe hypotension, severe cerebral dysfunction, dehydration and other diseases. The use of the drug should be evaluated and guided by a professional physician, during the use of the drug, pay attention to observe the improvement of the patient’s symptoms and the occurrence of adverse reactions.