After the PCI procedure,in patients with neither aspirin resistance,allergy,nor increased risk of bleeding,aspirin 162-325mg daily should be given for at least 1 month after BMS implantation, 3 month after sirolimuseluting stent implantation, and 6 month after paclitaxeleluting stent implant, after which daily chronic aspirin use should be continued indenfinitely at a dose of 75 to 162mg.