Probable interaction between warfarin and a toothache solution containing Piper longum L. leading to ischemic stroke: a case report.
Jing Huang, Chenchen Sun, Guodong Lou
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Case in brief
A patient with a mechanical heart valve on warfarin experienced fluctuations in their international normalized ratio (INR) and subsequently suffered an ischemic stroke. Investigation revealed a probable interaction between warfarin and a toothache solution containing Piper longum L., which contributed to the stroke. The case highlights the importance of monitoring potential drug interactions in patients on anticoagulation therapy.
Diagnostic / clinical pearl
Clinicians should be aware of the potential interaction between warfarin and herbal remedies, such as Piper longum, which can lead to significant adverse events like ischemic stroke.