Polivir is the trade name for clopidogrel bisulfate, and it is OK to stop clopidogrel bisulfate suddenly and have other antiplatelet drugs to replace it, if there are no antiplatelet drugs to replace it will cause an increased chance of cardiovascular events. Stent implantation for coronary artery disease requires aspirin combined with clopidogrel bisulfate for one year. If you have been taking it for one year, you can take aspirin alone as an antiplatelet, and there is little danger of stopping clopidogrel bisulfate suddenly. If there is no other antiplatelet drugs instead, suddenly stopping clopidogrel bisulfate will largely increase the occurrence of cardiovascular and cerebrovascular events, such as coronary heart disease, myocardial infarction, cerebral infarction and so on. Stopping all antiplatelet drugs after stent placement is likely to lead to in-stent thrombosis. If you want to stop the drug while taking clopidogrel bisulfate, you must follow your doctor and stop the drug reasonably under the doctor’s guidance.