Answer
Discard the tube one month after first opening, even if some contents remain.
Sources for this answer
- Fusidic Acid 1% Viscous Eye Drops / Fucithalmic 1% w/w Viscous Eye Drops — 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.