Most people now know that it is routine to take aspirin after a brain attack. However, in reality, many people take it ineffectively or inefficiently. Why? One important reason is the low rate of platelet inhibition after taking the drug. Because some people’s platelets are naturally unresponsive to aspirin, they are unable to bring down platelet aggregation and are clinically ineffective. Therefore, if possible, you can check the platelet aggregation rate after taking it for a period of time to evaluate whether it is effective. Mechanism of aspirin for prevention of cardiovascular disease: Heart attack or brain attack is due to the formation of blood clots in blood vessels, which leads to blockage of blood vessels and thus causes necrosis of heart muscle or brain tissue. Aspirin achieves prevention by inhibiting platelet aggregation and reducing thrombus formation.