Inclusion Criteria:  Previous episode(s) with asthma-like symptoms and / medical treatment with SABA as mono-therapy or SABA in combination with ICS and possibly LTRA. The parent/guardian(s) agrees to admit the child and is willing to follow the procedure of the trial. The child is between 12-71 months old. Fluent Danish skills with parents / guardians.  Exclusion Criteria:  Known allergy to macrolide antibiotics. Known impaired liver function. Known renal impairment. Known with neurological or psychiatric diseases. Known with congenital or documented acquired QT interval. Known for clinically relevant bradycardia, cardiac arrhythmia or severe heart failure. Clinical signs of pneumonia (Objective findings, including severe tachypnoea: respiratory rate (RF)> 50 and / or Fever: temperature> 39 °C and / or C-reactive protein (CRP)> 50).