SPL Set ID: 268c3f6b-8798-7987-3b8c-7b7f560af5d7

Brimonidine Tartrate/Timolol Maleate Ophthalmic Solution 0.2%/0.5%, sterile, is a relatively selective alpha-2 adrenergic receptor agonist with a non-selective beta-adrenergic receptor inhibitor (topical intraocular pressure lowering agent). The structural formulae are: Brimonidine tartrate: 5-bromo-6-(-2-imidazolin-2-ylamino) quinoxaline D-tartrate (1:1); MW= 442.22 Timolol maleate: (-)-1-( tert -butylamino)-3-[(4-morpholino-1,2,5-thiadiazol-3-yl)-oxy]-2-propanol maleate (1:1) (salt); MW= 432.50 as the maleate salt In solution, Brimonidine Tartrate/Timolol Maleate Ophthalmic Solution 0.2%/0.5% has a clear, greenish-yellow color. It has an osmolality of 260-330 mOsmol/kg and a pH during its shelf life of 6.5-7.3. Brimonidine tartrate appears as a white to slightly yellowish powder and is soluble in both water (1.5 mg/mL) and in the product vehicle (3 mg/mL) at pH 7.2. Timolol maleate appears as a white or practically white, odorless, crystalline powder and is soluble in water, methanol, and alcohol. Each mL of Brimonidine Tartrate/Timolol Maleate Ophthalmic Solution contains the active ingredients brimonidine tartrate 0.2% and timolol 0.5% with the inactive ingredients benzalkonium chloride 0.005%; sodium phosphate dibasic heptahydrate; sodium phosphate monobasic monohydrate; water for injection; and hydrochloric acid and/or sodium hydroxide to adjust pH. brimonidine timolol