The role of capsule aperture size on the dispersion of carrier-based formulation at different air flowrates.
Int J Pharm
; 642: 123152, 2023 Jul 25.
Article
en En
| MEDLINE
| ID: mdl-37339687
ABSTRACT
The effect of capsule aperture size on the aerosol performance of lactose blend formulation was studied using Foradil® (containing 12 µg of formoterol fumarate (FF1) and 24 mg of lactose) dispersed with a powder inhaler Aerolizer® at increasing air flowrates. Apertures sizes of 0.4, 1.0, 1.5, 2.5, and 4.0 mm were introduced at the opposite ends of the capsule. The formulation was dispersed into a Next Generation Impactor (NGI) at 30, 60 and 90 L/min, with the fine particle fractions (FPFrec and FPFem) measured by chemical assay of FF and lactose using high-performance liquid chromatography. Particle size distribution (PSD) of FF particles dispersed in wet media was also characterized by laser diffraction. FPFrec showed a stronger dependency on the flowrate than the capsule aperture size. The most efficient dispersion was achieved at 90 L/min. At a given flowrate, FPFem remained broadly constant across different aperture sizes. The laser diffraction studies demonstrated the presence of large agglomerates.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Nebulizadores y Vaporizadores
/
Lactosa
Idioma:
En
Revista:
Int J Pharm
Año:
2023
Tipo del documento:
Article
País de afiliación:
Australia