GENOPTIC® (gentamicin sulfate ophthalmic solution; USP) is a sterile, topical anti-infective agent for ophthalmic use. The active ingredient, gentamicin sulfate, is a water-soluble antibiotic of the aminoglycoside group. Gentamicin is obtained from cultures of Micromonospora purpurea. It is a mixture of the sulfate salts of gentamicin C ₁ , C ₂ , and C _1A . All three components appear to have similar antimicrobial activities. Gentamicin sulfate occurs as a white to buff powder and is soluble in water but insoluble in alcohol.

GENOPTIC® Solution:

Contains: Each mL contains-- Active: gentamicin sulfate equivalent to 3 mg (0.3%) gentamicin base. Preservative: Benzalkonium chloride. Inactives: edetate disodium; polyvinyl alcohol 1.4%; purified water; sodium chloride; sodium phosphate, dibasic; and hydrochloric acid and/or sodium hydroxide to adjust the pH. The solution is an aqueous, buffered solution with a pH of 6.5-7.5.