Which of the following is NOT a side effect associated with gentamicin?

Gentamicin is an aminoglycoside antibiotic primarily used to treat serious bacterial infections. It is known for several significant side effects, primarily ototoxicity, neurotoxicity, and nephrotoxicity.

Ototoxicity is a well-documented side effect of gentamicin, where damage to the inner ear can lead to hearing loss or balance issues. This occurs because aminoglycosides can accumulate in the inner ear and affect the hair cells responsible for hearing and balance.

Neurotoxicity, although less common than ototoxicity, can occur with aminoglycosides and may manifest as neuromuscular blockade, particularly in patients with renal impairment or those receiving high doses.

Nephrotoxicity is another significant concern with gentamicin use. It can cause acute kidney injury, and patients on prolonged therapy or those with existing renal issues are particularly at risk.

In contrast, hepatotoxicity is not a known side effect of gentamicin. While other antibiotics may have liver toxicity as a side effect, gentamicin predominantly affects the ears and kidneys rather than the liver. Therefore, the option indicating hepatotoxicity correctly identifies a side effect that is not associated with gentamicin.