Antiplatelet Regimen for Extracranial Stent Placement

Initial Periprocedural Period (First 30 Days)

The American College of Cardiology recommends dual antiplatelet therapy with aspirin 75-325 mg daily plus clopidogrel 75 mg daily for at least 30 days post-procedure 1
Administer dual antiplatelet therapy with aspirin 75-325 mg daily and clopidogrel 75 mg daily for the first month after extracranial stent placement, as recommended by the American College of Chest Physicians 2, 3
The aspirin dose can range from 75-325 mg during this initial period, though many practitioners use 325 mg acutely and then reduce to 81-100 mg for maintenance, according to the American Heart Association 1

Continue dual antiplatelet therapy with low-dose aspirin 75-100 mg daily and clopidogrel 75 mg daily for up to 12 months, based on Grade 2C evidence from the American College of Chest Physicians 3, 4
The rationale is to prevent late stent thrombosis during the endothelialization period, which may take several months to complete, as suggested by the Journal of Neurointerventional Surgery 5

Transition to single antiplatelet therapy after 12 months, as continuing dual therapy beyond this point provides no additional benefit and may increase bleeding risk, according to the American College of Chest Physicians 2, 3
Single antiplatelet therapy should continue indefinitely for secondary stroke prevention in patients with extracranial atherosclerotic disease, as recommended by the American College of Cardiology 1
Acceptable single antiplatelet options include aspirin 75-325 mg daily, clopidogrel 75 mg daily, or aspirin plus extended-release dipyridamole (25/200 mg twice daily), according to the American Heart Association 1

If bleeding complications occur, consider reducing aspirin dose to 75-81 mg while maintaining clopidogrel, rather than stopping both agents, as suggested by the American College of Chest Physicians 4
Be aware that the MATCH trial demonstrated a 1.3% absolute increase in life-threatening bleeding with dual antiplatelet therapy in high-risk stroke patients, so vigilance for hemorrhagic complications is essential, according to the Journal of Neurointerventional Surgery 5, 7

If the patient has an allergy or intolerance to either aspirin or clopidogrel, cilostazol 100 mg twice daily can substitute for the problematic agent as part of dual antiplatelet therapy, as recommended by the American College of Chest Physicians 3, 4
Monitor for drug interactions, particularly with proton pump inhibitors that may reduce clopidogrel effectiveness, as suggested by the Journal of Neurointerventional Surgery 5