SPL Set ID: 301ecffc-ecaf-01de-e063-6294a90a61b3

Levofloxacin tablets are synthetic antibacterial agents for oral administration. Chemically, levofloxacin, a chiral fluorinated carboxyquinolone, is the pure (-)-(S)-enantiomer of the racemic drug substance ofloxacin. The chemical name 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. Figure 1 The Chemical Structure of Levofloxacin Its molecular formula is C 18 H 20 FN 3 O 4 • ½ H 2 O and the molecular weight is 370.38. Levofloxacin, USP is a light yellowish–white to yellow–white crystals or crystalline powder. The molecule exists as a zwitterion at the pH conditions in the small intestine. The data demonstrate that from pH 0.6 to 5.8, the solubility of levofloxacin is essentially constant (approximately 100 mg/mL). Levofloxacin is considered soluble to freely soluble in this pH range, as defined by USP nomenclature. Above pH 5.8, the solubility increases rapidly to its maximum at pH 6.7 (272 mg/mL) and is considered freely soluble in this range. Above pH 6.7, the solubility decreases and reaches a minimum value (about 50 mg/mL) at a pH of approximately 6.9. Levofloxacin has the potential to form stable coordination compounds with many metal ions. This in vitro chelation potential has the following formation order: Al +3 > Cu +2 > Zn +2 > Mg +2 > Ca +2 . Each levofloxacin tablet, USP intended for oral administration contains levofloxacin hemihydrate equivalent to 250 mg or 500 mg or 750 mg of levofloxacin. In addition, each tablet contains the following inactive ingredients: crospovidone, hypromellose, magnesium stearate, microcrystalline cellulose, polyethylene glycol 6000, talc and titanium dioxide. The product meets USP Dissolution Test 2. Structure product formula for Levofloxacin