Tobramycin is better than gentamicin for Conjunctivitis.

Gentamicin is a gram-negative, heat-stable antibiotic. It is not taken orally, but can be used topically or intravenously.

Conjunctivitis tobramycin is more effective than gentamicin for a cat.

Gentamicin ointment is to be used externally for skin infections and such while Gentamicin ophthalmic ointment is for the eyes ONLY! Also, if it is an old prescription OR someone else's script, DO NOT use it. Even with something as simple as an antibiotic, it can be harmful is misused. Hope this helps!

No, it's an aminoglycoside.