brimonidine

noun

bri·​mo·​ni·​dine bri-ˈmō-nə-ˌdēn 

: an alpha-blocker C₁₁H₁₀BrN₅·C₄H₆O₆ used in a topical ophthalmic solution to reduce intraocular pressure (as in the treatment of open-angle glaucoma) or in a topical gel applied to the skin to reduce redness associated with rosacea

Note: Trademarks for preparations containing brimonidine include Alphagan, Combigan, and Mirvaso.