Quinine and Warfarin: Drug Interaction Guide

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

Interaction severity: Moderate — caution required

How Quinine interacts with Warfarin

Quinine can potentiate anticoagulation through hepatic metabolic effects and may independently increase bleeding risk through thrombocytopenia. INR elevation and bleeding have been reported.

What you should do

Avoid unnecessary quinine in warfarin-treated patients. If used, monitor INR and platelet-related bleeding symptoms closely.

Key facts

Severity

Moderate — caution required

Mechanism

Quinine can potentiate anticoagulation through hepatic metabolic effects and may independently increase bleeding risk th...

Action

Avoid unnecessary quinine in warfarin-treated patients. If used, monitor INR and platelet-related bleeding symptoms clos...

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 Quinine and Warfarin together?

With caution. Avoid unnecessary quinine in warfarin-treated patients. If used, monitor INR and platelet-related bleeding symptoms closely.

What is the severity of this interaction?

The interaction between Quinine and Warfarin is classified as Moderate — caution required. Quinine can potentiate anticoagulation through hepatic metabolic effects and may independently increase bleeding risk through thrombocytopenia. INR elevation and bleeding have been reported.

What should I do if I'm prescribed both?

Avoid unnecessary quinine in warfarin-treated patients. If used, monitor INR and platelet-related bleeding symptoms closely. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

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