Anas Ibraheem: Clearing the Long-Standing Debate on Bleeding Risk in VTE Anticoagulation
Anas Ibraheem, Medical Oncology Fellow at The London Clinic, shared Abdulrahman Nasiri‘s post on LinkedIn:
“A recent gem from NEJM, COBRRA trial: an international trial with a prospective, randomised, open-label, and blinded end-point design clear the long-standing debate of apixaban vs rivaroxaban (head-to-head) bleeding risk when a decision to start anticoagulants for acute VTE is taken.
A wonderful illustration of those results in the attached post. ”
Abdulrahman Nasiri, Assistant Professor of Medicine and Hematology at Imam Mohammad Ibn Saud Islamic University, shared a post on LinkedIn:
“In preparation for my upcoming Grand Rounds presentation, I’ve put together these slides translating the recent COBRRA trial (NEJM 2026) titled:
‘Settling the DOAC Debate in Acute VTE’
For years, major clinical guidelines haven’t recommended one DOAC over another due to a lack of head-to-head randomized trials.
Here is the most important concepts and the clinical shift this trial brings to our practice:
- Identical Efficacy: Both apixaban and rivaroxaban demonstrated an identical approximately one percent rate of recurrent VTE.
- Superior Safety: Apixaban cut the risk of clinically relevant bleeding by more than half and drove an 84 percent reduction in major bleeding.
- The Dosing Hypothesis: Why the difference? The bleeding divergence explodes in the first 3 weeks.
Rivaroxaban requires a high-dose induction phase that is three times longer than apixaban (twenty-one days versus seven days).
I am sharing the presentation here, please feel free to use and adapt these slides for your own reference, clinical discussions, or teaching! ”

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