Answer
Grapefruit juice can moderately inhibit CYP3A4 and increase exposure to the active metabolite. Ask a pharmacist or prescriber about regular grapefruit consumption.
Sources for this answer
- Fesoterodine fumarate Dr. Reddy's/TERALEVE 8 mg Prolonged-Release Tablets — Current selected SmPCemc · Summary of Product Characteristics
- Fesoterodine fumarate Aristo 4mg tablets — Current selected SmPCemc · Summary of Product Characteristics