 This is a single-centre, open label study, aiming to evaluate the efficacy of beclomethasone dipropionate applied for 12 weeks with a dose of 400 μg twice a day total dose 800 μg nebulized, on airway resistance and reactances measured with Rint and FOT techniques in children with recurrent wheezing, aged 2-5 years. In addition, clinic score as frequency of symptoms and exacerbations, will be assessed. 