Trusopt is a prescription dorzolamide hydrochloride ophthalmic solution 2% supplied in a 5 mL bottle. Each mL contains dorzolamide 20 mg; preservative: benzalkonium chloride 0.0075%. This antiglaucoma agent is intended for ophthalmic use as directed by a healthcare professional. DIN 02216205; prescription required in Canada, including Quebec. Manufactured by Elvium Life Sciences.