timolol hemihydrate - Medication Listings

Timolol ophthalmic solution 0.5%, is a non-selective beta-adrenergic antagonist for ophthalmic use. The chemical name of the active ingredient is (S)-1-[(1,1-dimethylethyl) amino]-3- [[4-(4-morpholinyl)-1,2,5-thiadiazol-3-yl]oxy]-2-propanol. Timolol hemihydrate is the levo isomer. Specific rotation is [α] 25 405nm=-16° (C=10% as the hemihydrate form in 1N HCl). The molecular formula of timolol is Formula C 13 H 24 N 4 O 3 S and its structural formula is: Timolol (as the hemihydrate) is a white, odorless, crystalline powder which is slightly soluble in water and freely soluble in ethanol. Timolol hemihydrate is stable at room temperature. Timolol ophthalmic solution is a clear, colorless, isotonic, sterile, microbiologically preserved phosphate buffered aqueous solution. It is supplied in dosage strength 0.5%. Each mL of timolol ophthalmic solution 0.5% contains 5.12 mg of timolol hemihydrate equivalent to 5.0 mg timolol. Inactive ingredients: monosodium and disodium phosphate dihydrate to adjust pH (6.5 - 7.5) and water for injection, benzalkonium chloride 0.01% added as preservative. The osmolality of timolol ophthalmic solution is 260 to 320 mosmol/kg. Image

Timolol maleate ophthalmic solution 0.5% is a non-selective beta-adrenergic receptor blocking agent. Its chemical name is (-)-1-( tert -butylamino) -3- [(4-morpholino 1,2,5-thiadiazol-3-yl)oxy]-2-propanol maleate (1:1) (salt). Timolol maleate possesses an asymmetric carbon atom in its structure and is provided as the levo-isomer. Its molecular formula is C 13 H 24 N 4 O 3 S-C 4 H 4 O 4 and its structural formula is: Timolol maleate has a molecular weight of 432.49. It is a white or almost white, crystalline powder which is soluble in water, sparingly soluble in ethanol, slightly soluble in chloroform, practically insoluble in ether. Timolol maleate ophthalmic solution is stable at room temperature. Timolol maleate ophthalmic solution is supplied as a sterile, isotonic, buffered, aqueous solution of timolol maleate in a single strength. It has a pH of 6.5-7.5 and an osmolality of 275-330 mOsm/kg. Each mL of timolol maleate ophthalmic solution contains the active ingredient 5 mg of timolol (6.8 mg of timolol maleate) with the inactive ingredients benzalkonium chloride (0.05 mg/mL), monobasic sodium phosphate monohydrate, potassium sorbate 0.47%, sodium chloride, sodium hydroxide, and purified water. Image