Answer
Caffeine may increase lithium clearance and alter lithium exposure, making the combination unsuitable without clinical review.
Sources for this answer
- Panadol Extra Advance/ Panadol Period Pain 500mg/65mg Tablets (GSL) — 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.