About clopidogrelthienopyridine class, platelet aggregation inhibitor, antithrombic, anti platelet agent.mechanism of action of clopidogrelthe drug exerts it`s antithrombotic action by interfering with platelet aggregation. it alters surface receptors in platelets and inhibits adp induced platelet-fibrinogen and platelet-platelet binding and prevents platelet aggregation. it blocks g-protein coupled p2yac type of inhibitory purinergic receptors which mediates adenylyl cyclase inhibition by adp. it prolongs bleeding time.ssindications for clopidogrels1. to reduce atherosclerotic events s2. thrombotic disorders s3. prevention of stroke s4. prophylaxis of myocardial infarction s5. peripheral vascular diseases s6. coronary artery diseases.