brinzolamide brimonidine tartrate - Generic Medications

SIMBRINZA (brinzolamide/brimonidine tartrate ophthalmic suspension) 1%/0.2% is a fixed combination of a carbonic anhydrase inhibitor and an alpha 2 adrenergic receptor agonist for topical ophthalmic use. Brinzolamide is described chemically as: (R)-(+)-4-Ethylamino-2-(3-methoxypropyl)-3,4-dihydro-2H-thieno [3,2-e]-1,2-thiazine-6-sulfonamide-1,1- dioxide. Its empirical formula is C 12 H 21 N 3 O 5 S 3 , and its structural formula is: Brinzolamide has a molecular weight of 383.5 g/mol. It is a white powder, which is insoluble in water, very soluble in methanol and soluble in ethanol. Brimonidine tartrate is described chemically as: 5-bromo-6-(2-imidazolidinylideneamino) quinoxaline L-tartrate. Its empirical formula of C 11 H 10 BrN 5 – C 4 H 6 O 6 and its structural formula is: Brimonidine tartrate has a molecular weight of 442.2 g/mol. It is a white to yellow powder that is soluble in water (34 mg/mL) at pH 6.5. SIMBRINZA (brinzolamide/brimonidine tartrate ophthalmic suspension) 1%/0.2% is supplied as a sterile, aqueous suspension which has been formulated to be readily suspended following shaking. It has a pH of approximately 6.5 and an osmolality of approximately 270 mOsm/kg. Each mL of SIMBRINZA (brinzolamide/brimonidine tartrate ophthalmic suspension) 1%/0.2% contains: Active ingredients: brinzolamide 10 mg, brimonidine tartrate 2 mg (equivalent to 1.32 mg as brimonidine free base); Preservative: benzalkonium chloride 0.03 mg; Inactive ingredients: boric acid, carbomer 974P, mannitol , propylene glycol, purified water, sodium chloride and tyloxapol. Hydrochloric acid and/or sodium hydroxide may be added to adjust pH.