คำอธิบาย
Valproic acid can displace warfarin from plasma protein binding sites and may inhibit platelet aggregation, increasing bleeding risk.
กลไก
Valproic acid displaces warfarin from albumin binding, transiently raising free warfarin concentrations; it also inhibits platelet aggregation independently through uncertain mechanisms.
ความสำคัญทางคลินิก
Total warfarin levels may appear unchanged while free fraction rises; bleeding risk is increased even without marked INR changes.
การจัดการ
Monitor INR and clinical signs of bleeding closely when combining; measure free warfarin levels if available. Adjust dose if INR changes.
ข้อจำกัดความรับผิดชอบทางการแพทย์
This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making medication decisions.