Work

An investigation into the influence of a co-solvent system on the physiochemical properties of spray dried guaifenesin

Year: 2025

Type: article

Abstract: Guaifenesin, a widely used expectorant, provides symptomatic relief for chest congestion and coughs associated with bronchitis, common colds, and other respiratory diseases. Pulmonary delivery via inhalation is advantageous for treating lung-related conditions, including asthma, chronic obstructive pulmonary disease (COPD), and various pulmonary infections. Spray drying, has superior particle engineering capabilities and is a well-known technique for engineering particles suitable for pulmonary delivery. This study demonstrates a route for effective spray drying of guaifenesin by exploiting a co-solvent system of methanol and water. It evaluates the interplay of co-solvent ratios, atomisation gas flow rates and the addition of an excipient on yield, particle size and density, with a view to engineering particles suitable for pulmonary delivery. Results show that particles with sizes below 5 µm (D 50 ) and densities of 1.44 g.cm −3 are readily attainable at high atomisation gas flow rates in all co-solvent ratios. At lower atomisation gas flow rates, the co-solvent ratio is the predominant factor influencing particle size.

Source: European Journal of Pharmaceutical Sciences

DOI: 10.1016/j.ejps.2025.107352

Authors: Laura Foley, Ayman Hijazi, Maryam Karimi-Jafari, Emmet O’Reilly

Institutions: University of Limerick, Synthesis and Solid State Pharmaceutical Centre

Language: English

Topic: Inhalation and Respiratory Drug Delivery

Subfield: Pulmonary and Respiratory Medicine

Field: Medicine

Domain: Health Sciences

Open Access status: gold

Estimated APC paid: $3,070

Funders: Synthesis and Solid State Pharmaceutical Centre, Science Foundation Ireland