The cause of coronary heart disease is the formation of atherosclerotic plaques in the coronary arteries, leading to insufficient blood supply to the heart and resulting in symptoms. Therefore, the emergency treatment for a coronary event often involves the use of medications that dilate the coronary arteries to alleviate the symptoms of myocardial ischemia. Commonly used nitrate medications taken sublingually can quickly relieve symptoms of angina. The significance of nitrates lies in their ability to release nitric oxide donors, which can effectively dilate the coronary arteries. This dilation improves blood flow through the coronary arteries and thus corrects symptoms of myocardial ischemia. During an attack, considering sublingual nitrate medication is advisable, provided there is no history of severe hypotension from nitrates, or if there is no hypotension during the attack, under these circumstances, this type of medication can be considered. If any of the above contraindications exist, such as low blood pressure, one might also consider sublingual administration of some traditional Chinese medicine preparations, like emergency pills, which can be used as well.