Crossover Study to Evaluate the Efficacy, Safety and Tolerability of Different Doses of Indacaterol in Patients With Persistent Asthma

Inclusion Criteria:

- Asthma for at least 6 months, using inhaled corticosteroid for at least one month,
foreced breath test less than below the normal value of the general population, -show
an immediate improvement in breathing when given albuterol

Exclusion Criteria:

- patients who have smoked in the past 6 months or are currently smoking, including
those who smoked more than a pack of cigarettes a day for at least 10 years,
-patients who have a history of life-threatening asthma, -patients who have had an
astham attack, in the last 6 weeks, requiring use of systemic steroids,
hospitalization, or ER visit, -patients who have had a respiratory tract infection or
worsening asthma between screening or run-in periods, patients requring use of other
asthma-related drugs during the trial, other protocol-defined inclusion/exclusion may
apply