Paracetamol and Warfarin: Drug Interaction Guide
Quick answer: Paracetamol and Warfarin have a minor interaction — typically manageable with awareness.
How Paracetamol interacts with Warfarin
Repeated high-dose paracetamol may enhance warfarin anticoagulation, possibly through effects on vitamin K cycle enzymes. Short-term low-dose use has less clinical impact.
What you should do
Use the lowest effective paracetamol dose for the shortest duration. Check INR if regular use continues for several days or doses are high.
Key facts
Severity
Minor — typically manageable
Mechanism
Repeated high-dose paracetamol may enhance warfarin anticoagulation, possibly through effects on vitamin K cycle enzymes...
Action
Use the lowest effective paracetamol dose for the shortest duration. Check INR if regular use continues for several days...
Frequently asked questions
Can I take Paracetamol and Warfarin together?
Usually yes, with awareness. Use the lowest effective paracetamol dose for the shortest duration. Check INR if regular use continues for several days or doses are high.
What is the severity of this interaction?
The interaction between Paracetamol and Warfarin is classified as Minor — typically manageable. Repeated high-dose paracetamol may enhance warfarin anticoagulation, possibly through effects on vitamin K cycle enzymes. Short-term low-dose use has less clinical impact.
What should I do if I'm prescribed both?
Use the lowest effective paracetamol dose for the shortest duration. Check INR if regular use continues for several days or doses are high. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.