warfarin
noun
war·fa·rin
ˈwȯr-fə-rən 
: a crystalline anticoagulant coumarin derivative C19H16O4 that inhibits the production of prothrombin by vitamin K and is used as a rodent poison and in medicine
also
: its sodium salt C19H15NaO4 used especially in the prevention or treatment of thromboembolic disease
Examples of warfarin in a Sentence
Recent Examples on the Web
People who take blood-thinning medications like Jantoven (warfarin) should reconsider eating green beans.
—
Cristina Mutchler, Verywell Health, 17 Nov. 2025
Use ginger cautiously or avoid it when taking anticoagulants like Coumadin (warfarin) or anti-platelet medications.
—Lauren O'Connor, Health, 21 Oct. 2025
Common blood thinners include warfarin, heparin, apixaban, rivaroxaban and dabigatran.
—Daryl Austin, USA Today, 5 Aug. 2025
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Cristina Mutchler, Verywell Health, 17 Nov. 2025
Use ginger cautiously or avoid it when taking anticoagulants like Coumadin (warfarin) or anti-platelet medications.
—Lauren O'Connor, Health, 21 Oct. 2025
Common blood thinners include warfarin, heparin, apixaban, rivaroxaban and dabigatran.
—Daryl Austin, USA Today, 5 Aug. 2025
See All Example Sentences for warfarin
Cite this Entry
“Warfarin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/warfarin. Accessed 5 Dec. 2025.
Copy CitationMedical Definition
warfarin
noun
war·fa·rin
ˈwȯr-fə-rən
: a crystalline anticoagulant coumarin derivative C19H16O4 related to dicumarol that inhibits the production of prothrombin by vitamin K and is used as a rodent poison and in medicine
also
: its sodium salt C19H15NaO4 used especially in the prevention or treatment of thromboembolic disease see coumadin
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