Answer
Hearing loss and balance-related toxicity have been reported with gentamicin. Stop using the drops and seek urgent assessment if hearing or balance changes develop.
Sources for this answer
- Gentisone HC Ear Drops/ Gentamicin 0.3% w/v and Hydrocortisone acetate 1% w/v Ear Drops — Current selected SmPCemc · Summary of Product Characteristics
- UK Government