Preparation and characterization of spray-dried inhalable powders containing nanoaggregates for pulmonary delivery of anti-tubercular drugs

Abstract

This study aims to prepare spray-dried inhalable powders containing anti-tubercular drugs–loaded HPMC nanoaggregates for sustained delivery of drugs to the lung. Nanoaggregates were prepared by precipitation technique. Results showed that the powders obtained had excellent aerosolization property. High drug encapsulation efficiency was achieved in HPMC nano aggregates, ranging from 60% to 70%. A single pulmonary dose resulted in therapeutic drug concentrations 40% to 60% in the lungs and in other organs (< 5%) for 24 h. From this study, we can conclude that delivering drugs through pulmonary route is advantageous for local action in lungs.

Keywords::

• HPMC polymer
• nanoaggregates
• pulmonary drug delivery
• spray-dried powders

Declaration of interest

The authors report no declarations of interest. The authors alone are responsible for the content and writing of the paper.

Tarun Garg is thankful to Punjab Technical University (PTU), Kapurthala, Punjab, for providing an opportunity to carry out the research work. Dr. Amit K. Goyal (under IYBA scheme; BT/01/IYBA/2009 dated 24/05/2010) is thankful to the Department of Biotechnology (DBT), New Delhi, India, for providing financial assistance to carry out the research work.