Quick-acting cardiac pills are mostly used for chest tightness and chest pain when the coronary arteries are not severely stenosed, when nitrate drugs are not tolerated and the symptoms are mild, and when there are no specific changes in ECG and cardiac enzymes. If the patient has clear symptoms of myocardial ischemia angina, it is recommended to apply nitrate drugs to relieve the symptoms, but not to apply quick-acting heart pills for treatment, the former has a more definite effect and can significantly dilate blood vessels. The former is more accurate and can significantly dilate the blood vessels. There is a certain amount of ice chips in the quick-acting heart pills, and the patient will have a certain level of comfort during the application, but the therapeutic effect is actually more limited.