SPL Set ID: d406759d-4c02-4fc0-b513-56b303afca98

Budesonide, the active component of budesonide inhalation suspension, is a corticosteroid designated chemically as (RS)-11β,16α,17,21-tetrahydroxypregna-1,4-diene-3,20-dione cyclic 16,17-acetal with butyraldehyde. Budesonide is provided as a mixture of two epimers (22R and 22S). The molecular formula of budesonide is C 25 H 34 O 6 and its molecular weight is 430.5 g/mol. Its structural formula is: Budesonide is a white or almost white, crystalline powder that is practically insoluble in water and sparingly soluble in alcohol. Its partition coefficient between octanol and water at pH 7.4 is 1.6 x 10 3 . Budesonide inhalation suspension is a sterile off-white colored aqueous suspension for inhalation via jet nebulizer and contains the active ingredient budesonide USP (micronized), and the inactive ingredients edetate disodium, sodium chloride, sodium citrate, citric acid monohydrate, polysorbate 80, and Water for Injection. Three dose strengths are available in single-dose ampules: 0.25 mg/2 mL, 0.5 mg/2 mL, and 1 mg/2 mL. For budesonide inhalation suspension, 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-Jet Plus Nebulizer/Pari Master compressor system, under in vitro conditions, the mean delivered dose at the mouthpiece (% nominal dose) was approximately 17% at a mean flow rate of 5.5 L/min. The mean nebulization time was 5 minutes or less. Budesonide inhalation suspension should be administered from jet nebulizers at adequate flow rates, via face masks or mouthpieces [ see Dosage and Administration (2) ]. spl-budesonide-str