NCIt definition : The tartrate salt form of brimonidine, an imidazole derivative and a selective alpha-2
adrenergic receptor agonist. Upon ocular administration, brimonidine tartrate acts
on the blood vessels causing them to constrict which leads to a decrease in the production
of aqueous humor. Brimonidine tartrate also enhances the outflow of aqueous humor.
This drug is used in the treatment of glaucoma to reduce intraocular pressure.;