A Study to Evaluate the Effect of Umeclidinium (UMEC) as Combination Therapy in Subjects With Chronic Obstructive Pulmonary Disease (COPD)

The UMEC DPI will contain one blister strip which will have 30 blisters of UMEC as dry powder blended with lactose and magnesium stearate, with no companion strip. Each actuation of the DPI will deliver the contents of one blister from each strip simultaneously.

The matching placebo DPI, identical in appearance to the inhaler containing active study medication, will have two blister strips, each containing 30 blisters of lactose and magnesium stearate.

Participants will use ICS/LABA combinations that are approved for the treatment of COPD at approved doses and frequency including SERETIDE 500/50mcg twice daily, FSC 500/50 mcg twice daily generic products such as AIRFLUSAL FORSPIRO inhaler 500/50mcg twice daily or ROLENIUM ELPENHALER inhaler 500/50mcg twice daily and SYMBICORT TURBUHALER inhaler at doses of 200/6mcg twice daily and 400/12mcg twice daily. The ICS/LABA will be sourced from local commercial stock while on the study

Albuterol/salbutamol MDI or nebules will be issued throughout the study as rescue medication, for use as-needed. Albuterol/salbutamol will be sourced from local commercial stock or provided centrally from GlaxoSmithKline.