This information is generalized and not intended as specific medical advice. Consult your healthcare professional before taking or discontinuing any drug or commencing any course of treatment.
Moderate. These medicines may cause some risk when taken together. Contact your healthcare professional (e.g. doctor or pharmacist) for more information.
How the interaction occurs:
When these two medicines are taken together, your body may not process warfarin properly.
What might happen:
You may experience an increased chance for bleeding, including bleeding from your gums, nosebleeds, unusual bruising, or dark stools.
What you should do about this interaction:
Contact your healthcare professionals (e.g. doctor or pharmacist) about taking these two medicines together. They may already be aware of this drug interaction and may be monitoring you for it.If your doctor prescribes these medicines together, you may need to check your bleeding test (INR) more often. You may need an adjustment in your warfarin dose.Do not start, stop, or change the dosage of any medicine before checking with them first.
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2.Hii JT, Duff HJ, Burgess ED. Clinical pharmacokinetics of propafenone. Clin Pharmacokinet 1991 Jul;21(1):1-10.
3.Rythmol (propafenone hydrochloride) US prescribing information. Abbott Laboratories March, 2013.