Dual Antiplatelet Therapy Duration After Minor Ischemic Stroke
Dual antiplatelet therapy with aspirin and clopidogrel after minor ischemic stroke is continued for 21 days when initiated within 24 hours of symptom onset. [1], [2]
Medication Selection Algorithm
- Aspirin + clopidogrel (P2Y12 inhibitor) is selected for most patients with minor non-cardioembolic ischemic stroke. [1], [2]
Key Evidence Supporting This Recommendation
- In the CHANCE trial, aspirin plus clopidogrel given within 24 hours of minor ischemic stroke reduced recurrent stroke with DAPT given for 21 days followed by clopidogrel alone to complete 90 days total antiplatelet therapy strategy. [3]
- In a pooled CHANCE+POINT analysis, DAPT benefit was concentrated in the first 21 days, supporting a limited DAPT course. [4]
Monotherapy Versus Combination Therapy
- After 21 days of aspirin + clopidogrel, antiplatelet therapy transitions to single-agent therapy (clopidogrel in the CHANCE trial protocol). [3]
Initiation Thresholds and Indications
- DAPT is recommended for minor ischemic stroke when started within 24 hours of symptom onset. [1], [2]
Common Pitfalls to Avoid
- Extending DAPT beyond the early post-stroke period increases bleeding risk without additional reduction in recurrent stroke risk compared with short-course strategies. [2], [4]
Target Outcomes of Therapy
- The short-course strategy aims to reduce early recurrent ischemic events during the first month after the index minor ischemic stroke while minimizing hemorrhagic complications. [1], [3], [4]