Answer
Yes. St John's wort may reduce afatinib exposure. Check every herbal or non-prescription product with the oncology team or pharmacist before use.
Sources for this answer
- Giotrif 20 mg film-coated 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.