brimonidine

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