Brimonidine is an α2 agonist medication used to treat open-angle glaucoma, ocular hypertension, and rosacea.

[5] More significant side effects may include allergic reactions and low blood pressure.

[10][11] Brimonidine is indicated for the lowering of intraocular pressure in people with open-angle glaucoma or ocular hypertension.

[3] The gel is indicated for the topical treatment of persistent (nontransient) facial erythema of rosacea in adults 18 years of age or older.

[2] A 2017 Cochrane review found insufficient evidence to determine if brimonidine slows optic nerve damage.