Answer
It helps open the airways, reducing cough and bronchospasm and improving delivery of the aerosol into the lungs.
Sources for this answer
- Pentamidine isetionate Tillomed 300 mg powder for solution for injection/infusion — Current selected SmPCemc · Summary of Product Characteristics
- NHSNHS · NHS medicine guidance
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.