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Information about Prasugrel

Prasugrel is an inhibitor of platelet aggregation that is used to decrease the risk of myocardial infarction and stroke in patients with acute coronary syndromes. 

Liver safety of Prasugrel

Prasugrel has been linked to mild and transient serum enzyme elevations during therapy and to rare instances of hypersensitivity reactions accompanied by mild liver injury.

Mechanism of action of Prasugrel

Prasugrel (pra' soo grel) is a thienopyridine inhibitor of adenosine diphosphate (ADP) receptors (P2Y12) on platelets, and is used as an anticoagulant to decrease the risk of recurrent coronary thromboses in patients who undergo interventions during an acute coronary syndrome.  Activated platelets release ADP which binds to ADP platelet receptors, causing activation of the intracellular glycoprotein IIb/IIIA complex which triggers platelet adherence and aggregation.  The aggregation of platelets plays an important role in the growth of atheromatous plaques, which can lead to coronary, cerebral and peripheral arterial occlusions.  Prasugrel is an irreversible inhibitor of the P2Y12 receptor and its effects last for the life time of the platelet (7 to 10 days).  In clinical trials, prasugrel therapy during acute coronary events (unstable angina and myocardial infarction) was equivalent or slightly better than clopidogrel in decreasing the frequency of recurrence of myocardial infarction and stent thrombosis. 

FDA approval information for Prasugrel

Prasugrel was approved for use in the United States in 2009 and has been used in limited numbers of patients for a limited time only.  Current indications are reduction of recurrent cardiovascular events in patients with acute coronary syndromes. 

Dosage and administration for Prasugrel

Prasugrel is available in 5 and 10 mg tablets under the commercial name Effient.  The usual oral dose is a loading dose of 60 mg followed by 10 mg daily in combination with aspirin. 

Side effects of Prasugrel

The most common side effect is bleeding (usually epistaxis); other side effects are not common, but can include headache, dizziness, fatigue, gastrointestinal upset, nausea, arthralgias and rash.  Rare, but more severe adverse events include hypersensitivity reactions including anaphylaxis.

List of antithrombotic agents



Antiplatelet agents


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