Conditions: Asthma
Keywords: GW642444 once daily dosing asthma efficacy safety FEV1
Allocation: RANDOMIZED | Intervention model: CROSSOVER
Enrollment: 75
Healthy volunteers: no

Brief summary:
The study is a multi-center, double-blind, placebo-controlled, cross-over study to evaluate the efficacy and safety of selected doses and dose intervals of the novel long acting beta agonist (LABA), GW642444 in asthmatic subjects ≥18 years of age who are currently receiving inhaled corticosteroid treatment.

Detailed description:
The study will be a five-period cross-over study with each 7 day treatment period separated by a 7 day wash-out period. The study will enroll asthmatic subjects ≥18 years of age who are currently receiving inhaled corticosteroid treatment with an FEV1 of between 40-85% of predicted normal and with airway reversibility as demonstrated by an increase in FEV1 of ≥12% and ≥200ml .

Efficacy assessments include 24-hour serial lung function testing. Safety assessments include incidence of adverse events and measurement of vital signs.

Arms:
arm 1: GW642444 Dose 2 QD/GW642444 Dose 4 QD/placebo/GW642444 Dose 1 BD/GW642444 Dose 3 QD arm 2: GW642444 Dose 3 QD/GW642444 Dose 2 QD/GW642444 Dose 4 QD/placebo/GW642444 Dose 1 BD arm 3: placebo/GW642444 Dose 1 BD/GW642444 Dose 2 QD/GW642444 Dose 3 QD/GW642444 Dose 4 QD arm 4: GW642444 Dose 1 BD/placebo/GW642444 Dose 3 QD/GW642444 Dose 4 QD/GW642444 Dose 2 QD arm 5: GW642444 Dose 4 QD/GW642444 Dose 3 QD/GW642444 Dose 1 BD/GW642444 Dose 2 QD/placebo

Interventions: intervention 1: Dose 4 QD intervention 2: Dose 3 QD intervention 3: placebo intervention 4: Dose 2 QD intervention 5: Dose 1 BD
Intervention descriptions: intervention 1: QD once daily intervention 2: QD once daily intervention 3: placebo intervention 4: QD once daily intervention 5: BD twice daily

Protocol document: