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Levofloxacin is (-)-(S)-9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylic acid hemihydrate. It has a molecular formula of C18H20FN3O4·½H2O, molecular weight of 370.38 and a melting point of 222-230°C (decomposition).
Levofloxacin is a light yellowish-white to yellowish-white crystals or crystalline powder, odorless and has a bitter taste. It is freely soluble in glacial acetic acid, sparingly soluble in water and methanol, slightly soluble in ethanol and practically insoluble in ether. It is light sensitive.
Excipients/Inactive Ingredients: Solution for infusion: Sodium chloride, sodium hydroxide, hydrochloric acid (q.s. pH 4.8) and water for injection.
