Currently, most of the stents used in the market are drug-eluting stents, and the incidence of the new drug-eluting stents is about 4% in 12 months, and the incidence of intra-stent thrombosis is about 1%. It is not a concept of how long each patient’s stent will last. It is important to keep taking medication after stenting in order to minimize the risk of stent problems. In addition, the purpose of medication is not only to ensure that the stent does not cause problems, but also to improve the long-term prognosis of coronary artery disease, which is the cornerstone of the treatment of coronary artery disease and should be adhered to regardless of whether the stent is placed or not.