Clopidogrel is a thienopyridine antiplatelet drug used in thromboembolic disorders. It is an analogue of ticlopidine and acts by inhibiting adenosine diphosphate-mediated platelet aggregation. It is given prophylactically as an alternative to aspirin in patients at risk of thromboembolic disorders eg, myocardial infarction, peripheral arterial disease and stroke. Clopidogrel is also used with aspirin in the management of patients with unstable angina, as an adjunct to medical or interventional management.
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