Why the study?
Does doxycycline coadministration enhance the anticoagulant effect of coumarin derivatives in patients on chronic oral anticoagulation therapy?
Does doxycycline coadministration enhance the anticoagulant effect of coumarin derivatives in patients on chronic oral anticoagulation therapy?
Doxycycline coadministration can markedly enhance the anticoagulant effect of coumarin derivatives, necessitating close monitoring of the prothrombin ratio and potential dosage adjustments.
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Doxycycline may potentiate coumarin-related bleeding; case reports leave open the need for controlled confirmation before changing practice.
Caraco et al. (1992) studied this question.
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