What we are studying
You have been asked to consider taking part in this study because you have severe asthma that is not well controlled. This study is being carried out to evaluate a new medicine to treat severe asthma compared with placebo (an inactive substance). Asthma is a lung disease associated with inflammation (swelling) of the air passages. Certain proteins made by the body, called interleukins, are thought to be important in causing inflammation. One of these proteins, interleukin-5 (IL-5), appears to play a major role in asthma. The study drug is an antibody made in the laboratory that has been made to block the effect of IL-5.