Paroxetine and Warfarin interaction
Paroxetine and Warfarin: both prescribing labels describe an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Paroxetine (BRISDELLE) label · effective 2025-04-28
For patients taking warfarin, carefully monitor the international normalized ratio.
Drugs Highly Bound to Plasma Protein (e.g., Warfarin) Increased free plasma concentrations The warfarin dosage may need to be reduced.
There may be a pharmacodynamic interaction between paroxetine and warfarin that causes an increased bleeding diathesis despite unaltered prothrombin time.
Carefully monitor patients receiving warfarin therapy when BRISDELLE is initiated or discontinued [see Warnings and Precautions ( 5.4 )] .
Concomitant use of aspirin, nonsteroidal anti-inflammatory drugs (NSAIDs), other antiplatelet drugs, warfarin, and other anticoagulants may add to this risk [see Drug Interactions ( 7.3 )] .
From the Warfarin (Warfarin Sodium) label · effective 2026-06-24
…Non-steroidal Anti-Inflammatory Agents celecoxib, diclofenac, diflunisal, fenoprofen, ibuprofen, indomethacin, ketoprofen, ketorolac, mefenamic acid, naproxen, oxaprozin, piroxicam, sulindac Serotonin Reuptake Inhibitors citalopram, desvenlafaxine, duloxetine, escitalopram, fluoxetine, fluvoxamine, milnacipran, paroxetine, sertraline, venlafaxine, vilazodone 7.4 Antibiotics…
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.