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Brits on Warfarin Warned to Avoid Cranberry Juice
11 Nov
Summary
- Cranberry juice can affect how warfarin is broken down, increasing bleeding risk
- NHS advises against drinking cranberry or grapefruit juice while on warfarin
- Consistency in diet is important for those taking anticoagulants
As of November 11th, 2025, Brits who take the common anticoagulant medication warfarin have been issued an urgent warning to avoid drinking cranberry juice. According to prescribing pharmacist Ian Budd from Chemist4U, cranberry juice can affect how the body breaks down warfarin, potentially making the drug stronger than intended.
This can lead to an increased risk of bleeding and bruising for those on the blood-thinning medication. The NHS echoes this advice, stating that cranberry and grapefruit juice should be avoided by warfarin users, as they can interfere with the drug's effects.
Maintaining a consistent diet is crucial for those taking anticoagulants like warfarin. While leafy greens, chickpeas, and liver - which are high in vitamin K - can be included, it's important to avoid drastic changes in consumption. Alcohol consumption should also be limited to no more than one or two drinks per day. Patients are advised to consult their pharmacist or doctor if they have any concerns about their medication and what they can or cannot consume.
