Table 3.

Potential anticoagulant adjustments in the management of recurrent or refractory thrombosis in cancer

Current anticoagulantModificationExample regimen
Warfarin Therapeutic LMWH Enoxaparin 1 mg/kg BID 
Subtherapeutic LMWH Therapeutic LMWH Enoxaparin 1 mg/kg BID 
Therapeutic LMWH 120%–125% LMWH for at least 4 weeks or
Switch to DOAC or
No change (± IVC filter placement) 
Enoxaparin 1.2 mg/kg BID
Rivaroxaban 15 mg BID × 21 days, then 20 mg daily 
Subtherapeutic DOAC Therapeutic DOAC or
Therapeutic LMWH or
No change (± IVC filter placement) 
Rivaroxaban 20 mg daily
Apixaban 5 mg BID 
Therapeutic DOAC Switch to therapeutic LMWH or
120%–125% LMWH or
“Reload” DOAC 
Enoxaparin 1-1.2 mg/kg BID
Rivaroxaban 15 mg BID × 21 days, then 20 mg daily 
Current anticoagulantModificationExample regimen
Warfarin Therapeutic LMWH Enoxaparin 1 mg/kg BID 
Subtherapeutic LMWH Therapeutic LMWH Enoxaparin 1 mg/kg BID 
Therapeutic LMWH 120%–125% LMWH for at least 4 weeks or
Switch to DOAC or
No change (± IVC filter placement) 
Enoxaparin 1.2 mg/kg BID
Rivaroxaban 15 mg BID × 21 days, then 20 mg daily 
Subtherapeutic DOAC Therapeutic DOAC or
Therapeutic LMWH or
No change (± IVC filter placement) 
Rivaroxaban 20 mg daily
Apixaban 5 mg BID 
Therapeutic DOAC Switch to therapeutic LMWH or
120%–125% LMWH or
“Reload” DOAC 
Enoxaparin 1-1.2 mg/kg BID
Rivaroxaban 15 mg BID × 21 days, then 20 mg daily 

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