Answer
Yes. Grapefruit juice can inhibit diazepam metabolism and increase sedation and memory problems.
Sources for this answer
- NHSNHS · NHS medicine guidance
- Diazepam 2 mg/5 ml Oral Suspension — 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.