Clopidogrel and aspirin are both antiplatelet aggregation.
Clopidogrel and aspirin are both anti-platelet aggregation, but the mechanism of action is different. They inhibit platelet aggregation through different pathways, so the effects are somewhat similar, but different.
To make an analogy, from A to B, you have three different paths, which from A to B, let's just look at it as the process of platelet activation and aggregation. Clopidogrel can block one of those paths, and aspirin can block the other path, so I should have a very different impact on the traffic from A to B by blocking one of them alone, than by blocking two of them. So, when we need to intensify antiplatelet aggregation in certain situations, such as coronary artery disease where a stent has just been placed in the coronary artery, then we generally use clopidogrel+aspirin combination antiplatelet therapy the most often.
As for you said clopidogrel and aspirin, between, although the same anti-platelet aggregation drugs, but because of the different path, of course, is different. For example, clopidogrel, on the gastrointestinal tract effect is not as big as aspirin, for example, clopidogrel onset of action time to be faster than aspirin, the effectiveness of the role of anti-platelet alone is also relatively stronger. This is like two paths a more straightforward, the other slightly twisted, that the influence of the traffic is of course different, right
Of course, specific to each patient, should be based on the actual situation, to see which one is more suitable for, and can not be said that the price is expensive, must be more advantageous, but according to the actual situation. For example, for Kawasaki disease Kawasaki disease, generally should be said to be aspirin is better, because aspirin is itself belongs to the antipyretic drugs, anti-inflammatory effect, that is not only anti-platelet aggregation, so than clopidogrel alone anti-platelet aggregation, more suitable for the treatment of Kawasaki disease. At this point, the expensive clopidogrel, in turn, is not as good as aspirin
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