SPL Set ID: 285a656c-f77f-4e77-b0a8-a0e9c901803f

Albuterol inhalation solution, USP is a sterile, clear, colorless solution of the sulfate salt of racemic albuterol, albuterol sulfate USP. Albuterol sulfate USP is a relatively selective beta 2 -adrenergic bronchodilator (see CLINICAL PHARMACOLOGY ). The chemical name for albuterol sulfate is α 1 -[( tert -Butylamino)methyl]-4-hydroxy- m -xylene-α,α'-diol sulfate (2:1) (salt), and its established chemical structure is as follows: The molecular weight of albuterol sulfate USP is 576.7 and the empirical formula is (C 13 H 21 NO 3 ) 2 • H 2 SO 4 . Albuterol sulfate USP is a white crystalline powder, soluble in water and slightly soluble in ethanol. The World Health Organization’s recommended name for albuterol is salbutamol. Albuterol inhalation solution, USP is supplied in two strengths in unit-dose vials. Each unit-dose vial contains either 0.75 mg of albuterol sulfate USP (equivalent to 0.021% or 0.63 mg of albuterol) or 1.5 mg of albuterol sulfate USP (equivalent to 0.042% or 1.25 mg of albuterol) with sodium chloride and sulfuric acid in a 3 mL isotonic, sterile, aqueous solution. Sodium chloride is added to adjust isotonicity of the solution and sulfuric acid is added to adjust pH of the solution to between 3 and 5 (see HOW SUPPLIED ). Albuterol inhalation solution, USP does not require dilution prior to administration by nebulization. For albuterol inhalation solution, USP like all other nebulized treatments, the amount delivered to the lungs will depend on patient factors, the jet nebulizer utilized, and compressor performance. Using the Pari LC Plus™ nebulizer (with face mask or mouthpiece) connected to a Pari PRONEB™ compressor, under in vitro conditions, the mean delivered dose from the mouth piece (% nominal dose) was approximately 43% of albuterol (0.042% or 1.25 mg strength) and 39% of albuterol (0.021% or 0.63 mg strength) at a mean flow rate of 3.6 L/min. The mean nebulization time was 15 minutes or less. Albuterol inhalation solution, USP should be administered from a jet nebulizer at an adequate flow rate, via a mouthpiece or face mask (see DOSAGE AND ADMINISTRATION ). F:\daisy assignment\6月份\06.20\albuterol-sulfate-inhalation-solution-6-20-2008\figure-01.jpg