The dispersion behaviour of dry powder inhalation formulations cannot be assessed at a single inhalation flow rate.

Abstract:

:The dispersion performances of inhalation powders are often tested at only one inhalation flow rate in mechanistic formulation studies. This limited approach is challenged by studies showing that interactions exist between inhalation flow rate and the effects on dispersion performance of several formulation variables. In this note we explain that such interactions with inhalation flow rate are, in fact, always to be expected. Because these interactions may greatly affect conclusions concerning the effects of formulation variables and their underlying mechanisms, the utility of future dry powder inhalation formulation studies may benefit from an approach in which dispersion performance is by default tested over a range of inhalation flow rates.

journal_name

Int J Pharm

authors

Grasmeijer F,de Boer AH

doi

10.1016/j.ijpharm.2014.02.024

subject

Has Abstract

pub_date

2014-04-25 00:00:00

pages

165-8

issue

1-2

eissn

0378-5173

issn

1873-3476

pii

S0378-5173(14)00117-3

journal_volume

465

pub_type

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