This study will compare patients treated with a marketed medication and those who continue with their usual care to assess the proportion of patients achieving well controlled asthma after 24 weeks.

Inclusion Criteria:

• documented clinical history of asthma and receiving regular maintenance therapy.

Exclusion Criteria:

• Using oral/parenteral or depot corticosteroids within 12 weeks of visit 1.
• History of heavy smoking or substance abuse.
• Females who are pregnant or lactating.
• Required emergency room treatment for their asthma 12 weeks prior to Visit 1.
• Serious, uncontrolled, systemic disease that may make study participation unsafe or inappropriate in the opinion of the physician.
• Other medical criteria will be evaluated at the screening visit.