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Chokri Ben Lamine: Anticoagulation Switching Pearls
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Apr 8, 2026, 14:17

Chokri Ben Lamine: Anticoagulation Switching Pearls

Chokri Ben Lamine, Adult Hematology and SCT Assistant Consultant at Oncology Center of Excellence at King Faisal Specialist Hospital and Research Center, shared a post on X:

“Anticoagulation Switching Pearls (LMWH to Warfarin to DOAC)

LMWH to Warfarin – Overlap is mandatory:

  • At least 5 days and INR at least 2 for 24–48 hours
  • Prevent early hypercoagulability (decreased Protein C)

Start warfarin at 2–5 mg, adjust according to INR

Stop LMWH only when INR is stable and therapeutic

LMWH and DOAC

  • Switching from LMWH to DOAC: Start DOAC at the time of the next LMWH dose; no overlap
  • Switching from DOAC to LMWH: Start LMWH at the time of the next DOAC dose; no overlap

Warfarin to DOAC

  • If INR is less than 2, start DOAC immediately
  • If INR is 2 to 2.5, start on the same day
  • If INR is greater than 2.5, delay

DOAC to Warfarin

  • Overlap DOAC with warfarin
  • Stop DOAC once INR is therapeutic

DOAC VTE Dosing in Adults

Apixaban

  • Acute VTE: 10 mg BID for 7 days
  • Then 5 mg BID
  • Extended 2.5 mg BID
  • Least bleeding risk, preferred in many hematology patients

Rivaroxaban

  • Acute VTE: 15 mg BID for 21 days
  • Then 20 mg once daily
  • Extended 10 mg once daily
  • Take with food

Edoxaban

  • Requires lead-in LMWH for 5 to 10 days
  • Then 60 mg once daily
  • Reduce to 30 mg if weight 60 kg or less or CrCl 15 to 50

Dabigatran

  • Requires LMWH lead-in for 5 to 10 days
  • Then 150 mg BID
  • Avoid if CrCl less than 30
  • Higher gastrointestinal side effects

Key Clinical Pearls

  • Only dabigatran and edoxaban need LMWH lead-in
  • Apixaban and rivaroxaban follow a single-drug approach

Cancer-associated VTE

  • DOAC such as apixaban or rivaroxaban preferred
  • Use LMWH if gastrointestinal or genitourinary bleeding risk

APS triple positive

  • Avoid DOAC; use warfarin

Renal failure

  • Prefer warfarin if severe CKD

Drug interactions

  • DOAC affected by P-gp and CYP3A4 inhibitors such as azole, chemotherapy, tyrosine kinase inhibitors

Bridging rule

  • Warfarin requires overlap
  • DOAC requires timing switch with no overlap.”

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Apixaban Chokri Ben Lamine CKD DOAC edoxaban Health Hematology Hemostasis Hemostasis News Hemostasis Today LMWH Medicine Rivaroxaban VTE Warfarin
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