Pulmonary deposition of fluticasone propionate/formoterol in healthy volunteers, asthmatics and COPD patients with a novel breath-triggered inhaler.

•Fluticasone/formoterol K-haler is a novel breath-triggered inhaler.•Two-dimensional scintigraphy was used to quantify lung deposition.•Study participants were healthy volunteers, asthma and COPD patients.•Good lung deposition after single dose with fluticasone/formoterol K-haler.