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 (PAROXETINE HYDROCHLORIDE) label · effective 2026-09-16
For patients taking warfarin, carefully monitor the international normalized ratio.
Drugs Highly Bound to Plasma Protein: Monitor for adverse reactions and reduce dosage of Paroxetine HCL CR or other protein-bound drugs (e.g., warfarin) as warranted.
For patients taking warfarin, carefully monitor the international normalized ratio [see Warnings and Precautions ( 5.5 )].
Increased Risk of Bleeding: Concomitant use of aspirin, nonsteroidal anti-inflammatory drugs, other antiplatelet drugs, warfarin, and other anticoagulant drugs may increase risk.
Concomitant use of aspirin, nonsteroidal anti-inflammatory drugs (NSAIDS), other antiplatelet drugs, warfarin, and other anticoagulants may add to this risk.
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.