Open-Label, Randomized, 6-Way Crossover, Single-Dose Study to Determine the Pharmacokinetics of Batefenterol (GSK961081) and Fluticasone Furoate When Administered Alone or in Combination

To investigate the pharmacokinetics of inhaled batefenterol (BAT) and fluticasone furoate (FF) given alone or in combination via ELLIPTA (R) dry powder inhaler (DPI-E), and BAT monotherapy via DISKUS (R) DPI (DPI-D). In this open-label, 6-way crossover study, 48 healthy subjects were randomized to 1 of 6 treatment sequences, comprising 6 single-dose treatment regimens: (1) BAT 1200 mu g via DPI-D; (2) BAT 1200 mu g via DPI-E without a lactose-filled second strip; (3) BAT 1200 mu g via DPI-E with a lactose-filled second strip; (4) BAT/FF 1200/300 mu g via DPI-E; (5) FF 300 mu g via DPI-E with a lactose-filled second strip; and (6) BAT/FF 900/ 300 mu g via DPI-E. Pharmacokinetic data were analyzed using noncompartmental methods. Plasma BAT area under the curve (AUC) and maximum plasma concentration (C-max) were similar for all treatments containing BAT 1200 mu g (geometric least-squares means [GLSM] ratio, 0.90-1.06). Plasma FF AUC and Cmax were reduced following BAT/FF 1200/ 300 mu g and 900/ 300 mu g versus FF 300 mu g monotherapy (GLSM ratio, 0.62-0.77). BAT 1200 mu g administered via DPI-E, alone or in combination with FF, resulted in similar systemic exposure versus BAT administered by DPI-D. FF exposure was reduced when administered in combination with BAT compared with FF alone.