TOBRAMYCIN Rivex Ophthalmics Antibiotic   Availability And Storage: Each mL of sterile ophthalmic solution contains: tobramycin 0.3%. Nonmedicinal ingredients: benzalkonium chloride (as a preservative), boric acid, purified water, sodium chloride, sodium hydroxide, sodium sulfate, sulfuric acid and tyloxapol. Plastic squeeze bottles of 5 mL with controlled tip applicators.