1. Medical diagnosis of uncontrolled, mild, persistent, allergic bronchial asthma in terms of the bronchial asthma NVL Version 1.3 (2011)
2. Children aged from 6 to 12 years (girls and boys)
3. Signed Informed Consent of the patient and his legal guardians to participate in the trial after written and verbal briefing by the Investigator
4. Improvement of the FEV1≥12% after 2 puffs of terbutaline 100 µg dur-ing steroid monotherapy with 400 µg budesonide equivalent/day or an ACT score ≤ 19 as an indication of insufficient asthma control
5. Asthma diagnosis for at least 1 year
You may not be if
1. Anamnestically known intolerance/allergy to one of the drugs applied or to their ingredients or to drugs of similar chemical structure
2. Participation of the patient in another clinical trial within the last four weeks before enrollment in this trial
3. Evidence suggesting that the patient or their legal representative is not likely to follow the trial protocol (e.g. lacking compliance)
4. Inability to measure lung function, to test bronchospasmolysis, to determine FeNO or to collect exhaled breath condensate, inability to document the symptoms in a symptom log book or questionnaire; in-ability to take the trial medication properly
5. Chronic illnesses of different aetiology
6. Vocal cord dysfunction
7. Premature birth or diagnosis of bronchopulmonary dysplasia
8. Gastroesophageal reflux
9. Acute respiratory infection within the previous 4 weeks
