Physician and Patient Perception of Adjustable Maintenance Dosing of Symbicort Turbuhaler

Inclusion Criteria: * Minimum of 6 months history of asthma and treatment with an inhaled corticosteroids for at least 3 months prior to visit 1 and/or a history of short term variation in airway function and asthma symptoms responding promptly to convent * Patients where use of a combination (inhaled corticosteroid and long acting beta2-agonist is appropriate, i.e. not controlled on inhaled corticosteroids alone). Exclusion Criteria: * Asthma exacerbation requiring oral corticosteroid treatment in the four weeks prior to visit 1 * Upper Respiratory Tract Infection in the previous four weeks * Severe cardiovascular disease or other significant concomitant disease, which may interfere with the conduct of the study. * Women enrolled in the trial should not be planning pregnancy and should be taking adequate contraceptive measures where appropriate. * Previous enrollment in a clinical study * Known or suspected hypersensitivity to budesonide, formoterol or inhaled lactose