TIM-AK Dioptic Timolol Maleate Elevated Intraocular Pressure Therapy   Availability And Storage: Each mL of sterile ophthalmic solution contains: timolol maleate equivalent to timolol 0.5%. Nonmedicinal ingredients: benzalkonium chloride, dibasic sodium phosphate, monobasic sodium phosphate, purified water, sodium chloride and sodium hydroxide. Plastic dropper bottles of 5 and 10 mL. Store between 15 and 30°C. Protect from light and freezing.