To Compare the Pharmacokinetics of Budesonide Delivered by BDA MDI to Budesonide Delivered by Pulmicort Respules in Children With Asthma Aged 4 to 8 Years.

Exclusion Criteria

• •1. Inability to change from any budesonide therapy to another suitable corticosteroid.
• •2. History of life-threatening asthma defined as any asthma episode associated with loss of consciousness, intubation or admission to an intensive care unit.
• •3. Unstable asthma as judged by the Investigator (eg, any change in asthma therapy within 2 weeks prior to screening or use of more than 2 occasions of rescue medication (albuterol) per day within 1 week prior to screening (potential for rescreen).
• •4. Children receiving regular maintenance treatment with prohibited anti-inflammatory or long-acting bronchodilator asthma medication (inhaled, nebulized, oral, or systemic) within 1 month prior to screening.
• •5. More than 1 short course of oral/rectal/systemic corticosteroids within 6 months preceding screening (Visit 1), or any oral/rectal/systemic corticosteroids within 30 days prior to screening.
• •6. Evidence of active concomitant pulmonary disease other than asthma (children with stable allergic rhinitis will be permitted, as long as, there are no changes in the treatment and the medications do not interfere with the analytical assay methods).
• •7. Upper respiratory infection involving antibiotic treatment not resolved within 14 days prior to Visit 1.
• •8. Children with a known or suspected hypersensitivity to albuterol/salbutamol, budesonide or any of the excipients used in the IMPs.