Background: Asthma is a common chronic condition characterized by respiratory symptoms and hyperresponsive airways. According to treatment guidelines, patients with persistent asthma require daily treatment with inhaled corticosteroids (ICS). However, certain subgroups of asthma patients such as non-eosinophilic asthma patients do not respond well to the ICS treatment. In the present study, asthma patients treated with ICS and exhibiting low levels of eosinophilic biomarkers such as S-periostin, FeNO and blood eosinophils, are randomized 1:1 to either 1) tapering of ICS or 2) usual care. Thus, the aim of the present study is to investigate whether patients with non-eosinophilic asthma can sustain their level of disease control during ICS tapering.