Table 4.

Recommended dosing of oral anticoagulants (OAC) in neonates and children.

OACDay 1Day 2From Day 3Target INR
Phenprocoumon 6 mg/m2 3 mg/m2 1–2 mg/m2 2.0–3.0 
Warfarin 0.2 mg/kg 0.2 mg/kg 0.1–0.3 mg/kg 2.0–3.0 
OACDay 1Day 2From Day 3Target INR
Phenprocoumon 6 mg/m2 3 mg/m2 1–2 mg/m2 2.0–3.0 
Warfarin 0.2 mg/kg 0.2 mg/kg 0.1–0.3 mg/kg 2.0–3.0 
Reversal of oral anticoagulant therapy
Coumarin therapy always to begin with concomitant heparin therapy (UFH or LMWH); to stop heparin, INR within therapeutic range for 2 days, concomitant medication at least 5 days; attention to multiple drug interactions 
no bleeding, slow reversal vitamin K 0.5–2.0 (−5.0) mg orally (s.c., i.v.) 
no bleeding, rapid reversal vitamin K 0.5–2.0 (−5.0) mg s.c. or i.v. 
significant bleeding, not life threatening vitamin K 0.5–2.0 (−5.0) mg s.c. or i.v. + FFP 20 mL/kg 
significant bleeding, life threatening vitamin K 5 mg i.v. over 20 min. (risk of anaphylactic shock) + prothrombin concentrate (Prothomplex) 50 U/kg i.v. 
Reversal of oral anticoagulant therapy
Coumarin therapy always to begin with concomitant heparin therapy (UFH or LMWH); to stop heparin, INR within therapeutic range for 2 days, concomitant medication at least 5 days; attention to multiple drug interactions 
no bleeding, slow reversal vitamin K 0.5–2.0 (−5.0) mg orally (s.c., i.v.) 
no bleeding, rapid reversal vitamin K 0.5–2.0 (−5.0) mg s.c. or i.v. 
significant bleeding, not life threatening vitamin K 0.5–2.0 (−5.0) mg s.c. or i.v. + FFP 20 mL/kg 
significant bleeding, life threatening vitamin K 5 mg i.v. over 20 min. (risk of anaphylactic shock) + prothrombin concentrate (Prothomplex) 50 U/kg i.v. 

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