Which of the following is a glaucoma medication?

• A. Xalatan
• B. Travatan
• C. Lumigan
• D. Timolol

Answer: (A)

Glaucoma medications aim to lower the pressure inside the eye to protect the optic nerve. Xalatan, which contains latanoprost, is a prostaglandin analog that increases the outflow of aqueous humor through the uveoscleral pathway, effectively reducing intraocular pressure. This mechanism makes it a classic glaucoma medication. The other options listed—Travatan (travoprost), Lumigan (bimatoprost), and Timolol (a beta-blocker that decreases aqueous humor production)—are also used to treat glaucoma, but they work through different mechanisms. Xalatan is a well-known example of a prostaglandin analog used for this purpose.