Micafungin

11 DESCRIPTION Micafungin for injection, USP is a sterile, lyophilized product for intravenous (IV) infusion that contains micafungin sodium, USP. Micafungin sodium, USP is a semisynthetic lipopeptide (echinocandin) synthesized by a chemical modification of a fermentation product of Coleophoma empetri F-11899. Micafungin inhibits the synthesis of 1,3-beta-D-glucan, an integral component of the fungal cell wall. Each single-dose vial contains 50 mg micafungin (equivalent to 50.86 mg micafungin sodium, USP) or 100 mg micafungin (equivalent to 101.73 mg micafungin sodium, USP), 200 mg lactose monohydrate, with citric acid anhydrous and/or sodium hydroxide (used for pH adjustment). Micafungin for injection, USP must be diluted with 0.9% Sodium Chloride Injection, USP or 5% Dextrose Injection, USP [see Dosage and Administration ( 2 )] . Following reconstitution with 0.9% Sodium Chloride Injection, USP, the resulting pH of the solution is between 5 to 7. Micafungin sodium, USP is chemically designated as: Pneumocandin A0,1-[(4R,5R)-4,5-dihydroxy-N 2 -[4-[5-[4-(pentyloxy) phenyl]-3-isoxazolyl]benzoyl]-L-ornithine]-4-[(4 S )-4-hydroxy-4-[4-hydroxy-3-(sulfooxy)phenyl]-L-threonine]-, monosodium salt. The chemical structure of micafungin sodium, USP is: The molecular formula is C 56 H 70 N 9 NaO 23 S and the molecular weight is 1292.3. Micafungin sodium, USP is a light-sensitive, hygroscopic white powder that is freely soluble in dimethyl sulfoxide, soluble in dimethyl formamide and water, sparingly soluble in methanol and slightly soluble to practically insoluble in acetone, methylethylketone, methylisobutylketone, ethanol, isopropanol, ethyl acetate, isopropyl acetate, acetonitrile, toluene, heptane and tetrahydrofuran. Image