Answer
Grapefruit juice can inhibit CYP3A4 and may increase or prolong fentanyl effects. Check with the prescriber and avoid grapefruit juice unless advised otherwise.
Sources for this answer
- NHSNHS · NHS medicine guidance
- Abstral Sublingual Tablets — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.