Prednisone and Warfarin: Drug Interaction Guide

Quick answer: This combination requires caution. Prednisone and Warfarin can be used together with adjustments and monitoring.

Interaction severity: Moderate — caution required

How Prednisone interacts with Warfarin

Systemic corticosteroids may alter warfarin response through effects on hepatic metabolism, clotting factor turnover, and gastrointestinal bleeding susceptibility. INR changes and bleeding have been reported.

What you should do

Check INR more frequently after starting or stopping systemic prednisone. Monitor for gastrointestinal bleeding, especially with additional risk factors.

Key facts

Severity

Moderate — caution required

Mechanism

Systemic corticosteroids may alter warfarin response through effects on hepatic metabolism, clotting factor turnover, an...

Action

Check INR more frequently after starting or stopping systemic prednisone. Monitor for gastrointestinal bleeding, especia...

Important medical disclaimer: This page provides educational information about drug interactions for general reference. It is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your specific medications with a qualified healthcare provider before starting, stopping, or changing any treatment. About our editorial team.

Frequently asked questions

Can I take Prednisone and Warfarin together?

With caution. Check INR more frequently after starting or stopping systemic prednisone. Monitor for gastrointestinal bleeding, especially with additional risk factors.

What is the severity of this interaction?

The interaction between Prednisone and Warfarin is classified as Moderate — caution required. Systemic corticosteroids may alter warfarin response through effects on hepatic metabolism, clotting factor turnover, and gastrointestinal bleeding susceptibility. INR changes and bleeding have been reported.

What should I do if I'm prescribed both?

Check INR more frequently after starting or stopping systemic prednisone. Monitor for gastrointestinal bleeding, especially with additional risk factors. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

Last reviewed: by iMedic Medical Editorial Team. Our editorial process.