Safety And Efficacy Of GSK233705 Plus Salmeterol Compared With 2 Active Comparators And Placebo In Subjects With Chronic Obstructive Pulmonary Disease (COPD)

A Multicentre, Randomised, Partially Blinded, Placebo-controlled, Three-way Crossover, Incomplete Block Design Study to Investigate the Safety, Tolerability, Pharmacodynamics/ Efficacy and Pharmacokinetics of Dual Bronchodilator Therapy With Salmeterol 50µg Twice-daily Plus Two Different Doses of GSK233705B (20 and 50µg Twice-daily), Compared With Placebo, Salmeterol 50µg Twice-daily Alone, and Tiotropium 18µg Once-daily Alone, in Subjects With Chronic Obstructive Pulmonary Disease

The safety, tolerability, pharmacokinetics and pharmacodynamics/efficacy profiles of two different doses of GSK233705 will be compared with 2 active comparators and placebo, all medication delivered via dry powder inhaler.

A multi-centre, randomised, partially blinded, placebo-controlled, three-way crossover, incomplete block design study to investigate the, safety, tolerability, pharmacodynamics/efficacy and pharmacokinetics of dual bronchodilator therapy with salmeterol 50 mcg twice daily plus two different doses of GSK233705 (20 and 50 mcg twice daily), compared with placebo, salmeterol 50 mcg twice daily alone, and tiotropium 18 mcg once daily alone, in subjects with chronic obstructive pulmonary disease

Inclusion criteria:

• females of non-childbearing potential or postmenopausal;
• history of COPD as defined by ATS/ERS criteria;
• moderate COPD responsive to ipratropium and salbutamol;
• current smoker or ex-smoker.

Exclusion criteria:

• no instable COPD; max 1000 mcg inhaled steroids per day; no B-blockers