SPL Set ID: f3ce78d9-e923-400e-b3cd-3e6124ac7f6d

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 empirical formula is C 13 H 21 NO 3 •HCl. It is a white to off-white, crystalline solid, with a melting point of approximately 188°C and is soluble in water and slightly soluble in ethanol. 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 (0.0103%) of levalbuterol (as 0.36 mg of levalbuterol HCl) or 0.63 mg (0.021%) of levalbuterol (as 0.73 mg of levalbuterol HCl) or 1.25 mg (0.042%) of levalbuterol (as 1.44 mg of levalbuterol HCl), sodium chloride to adjust tonicity, 0.33 mg of edetate disodium dihydrate, 6 mg of trisodium citrate dihydrate and sulfuric acid to adjust the pH to 4.0 (3.3 to 4.5). chemical structure