Coronary heart disease must take medication after stent implantation in heart vessels for two main reasons: 1, stent implantation is easy to restenosis, to eat anti-platelet aggregation drugs to prevent stent plugging up; 2, coronary heart disease is a chronic disease, stent only solve the lesion is very serious, causing heart discomfort of narrowed blood vessels, can not cure coronary heart disease. Therefore, after the diagnosis of coronary heart disease, in addition to improving lifestyle, should be regular cardiology clinic, according to medical advice medication.