Answer
Yes. It can oppose warfarin's anticoagulant effect, so the anticoagulation service or prescriber should know about its use.
Sources for this answer
- Menadiol Diphosphate 10mg Tablets — Current selected SmPCemc · Summary of Product Characteristics
- NHSNHS · NHS medicine guidance
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.