SPL Set ID: 85a59e0c-ff09-49a6-b7b8-616e033107b4

Levalbuterol inhalation solution, USP is a sterile, clear, colorless, preservative-free solution of the hydrochloride salt of levalbuterol, the (R)-enantiomer of the drug substance racemic albuterol. Levalbuterol HCl is a relatively selective beta 2 -adrenergic receptor agonist [see Clinical Pharmacology ( 12 ) ]. The chemical name for levalbuterol HCl is (R)-α 1 -[[(1,1­ dimethylethyl)amino]methyl]-4-hydroxy-1,3-benzenedimethanol hydrochloride, and its established chemical structure is as follows: The molecular weight of levalbuterol HCl is 275.8, and its molecular formula is C 13 H 21 NO 3 •HCl. It is a white to off-white, crystalline solid, with a melting point of approximately 187°C and solubility of approximately 180 mg/mL in water. Levalbuterol HCl is the USAN modified name for (R)-albuterol HCl in the United States. Levalbuterol inhalation solution, USP is supplied in unit-dose vials and requires no dilution before administration by nebulization. Each 3 mL unit-dose vial contains 0.31 mg of levalbuterol (as 0.36 mg of levalbuterol HCl, USP) or 0.63 mg of levalbuterol (as 0.73 mg of levalbuterol HCl, USP) or 1.25 mg of levalbuterol (as 1.44 mg of levalbuterol HCl, USP), sodium chloride to adjust tonicity, 0.30 mg of edetate disodium and sulfuric acid to adjust the pH to 4.0 (3.3 to 4.5). levalbuterol-chemical-structure