Answer
Ibuprofen and other NSAIDs can increase bleeding risk. Do not take them unless a clinician who knows you take phenindione has advised it.
Sources for this answer
- Dindevan 25mg Tablets / Phenindione 25mg 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.