WARFARIN SODIUM Drug Interactions
Also known as: Warfarin Sodium
Warfarin Sodium is a "blood thinner" (anticoagulant) medication that helps prevent and treat harmful blood clots in the body. It works by reducing the body's ability to form clots, which can help prevent serious conditions like strokes, heart attacks, and clots in the legs or lungs, especially in people with certain heart conditions or after a heart attack.WARFARIN SODIUM has 5 documented drug interactions in our database, including 0 contraindicated, 5 major, 0 moderate, and 0 minor interactions.
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Contraindicated
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Major
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Moderate
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Minor
Concomitant use of warfarin and sertraline can significantly increase the risk of bleeding, including serious or life-threatening hemorrhage. Sertraline may enhance the anticoagulant effect of warfarin, necessitating close monitoring.
Mechanism
Sertraline may inhibit the metabolism of warfarin (particularly S-warfarin via CYP2C9), increasing its plasma concentrations. Additionally, sertraline's serotonergic effects can impair platelet aggregation, contributing to an increased bleeding risk.
Clinical Management
Avoid co-administration if possible. If concomitant use is necessary, closely monitor INR and clinical signs of bleeding, especially during initiation or dose changes of sertraline. Adjust warfarin dose as needed to maintain target INR.
Concomitant use of warfarin and naproxen significantly increases the risk of bleeding, including serious gastrointestinal bleeding. Patients may experience bruising, epistaxis, hematuria, or more severe hemorrhagic events.
Mechanism
Naproxen, an NSAID, inhibits platelet aggregation and can cause gastrointestinal irritation and ulceration. Warfarin is an anticoagulant that inhibits vitamin K-dependent clotting factors. The combined antiplatelet and anticoagulant effects, along with GI mucosal damage from naproxen, lead to an additive increase in bleeding risk.
Clinical Management
Avoid concomitant use if possible. If co-administration is necessary, monitor patients closely for signs of bleeding, especially GI bleeding. Adjust warfarin dose as needed, and consider a proton pump inhibitor for GI protection.
Concomitant use of warfarin and ibuprofen significantly increases the risk of bleeding, including serious gastrointestinal bleeding. Patients may experience bruising, nosebleeds, or more severe hemorrhagic events requiring medical intervention.
Mechanism
Warfarin inhibits vitamin K-dependent clotting factors, leading to anticoagulation. Ibuprofen, an NSAID, inhibits platelet aggregation and can cause gastric irritation, both of which contribute to an increased risk of bleeding when combined with warfarin.
Clinical Management
Avoid concurrent use if possible. If co-administration is necessary, closely monitor patients for signs of bleeding, particularly gastrointestinal bleeding, and frequently check INR levels. Consider alternative analgesics like acetaminophen.
Concomitant use of celecoxib with warfarin significantly increases the risk of serious bleeding events, including gastrointestinal hemorrhage. Patients may experience bruising, epistaxis, hematuria, or melena, potentially leading to hospitalization or death.
Mechanism
Celecoxib, a COX-2 inhibitor, can inhibit platelet aggregation to some extent and cause gastrointestinal irritation, increasing the risk of bleeding. It also displaces warfarin from plasma protein binding sites and inhibits warfarin metabolism (CYP2C9), leading to increased free warfarin concentrations and enhanced anticoagulant effect.
Clinical Management
Avoid concomitant use if possible. If co-administration is necessary, closely monitor INR and for signs of bleeding, especially during initiation or dose changes of celecoxib. Adjust warfarin dose as needed to maintain target INR.
Concomitant use of warfarin and diclofenac significantly increases the risk of serious bleeding, including gastrointestinal hemorrhage. Patients may experience bruising, epistaxis, hematuria, or more severe internal bleeding events, which can be life-threatening.
Mechanism
Warfarin is an anticoagulant that inhibits vitamin K-dependent clotting factors. Diclofenac, an NSAID, inhibits platelet aggregation and can cause gastrointestinal irritation and ulceration, thereby increasing the risk of bleeding when combined with warfarin.
Clinical Management
Avoid concomitant use if possible. If co-administration is unavoidable, closely monitor the patient for signs of bleeding and frequently check INR levels, adjusting warfarin dose as needed. Consider gastroprotective agents and alternative pain management strategies.
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