Corticosteroids/β2-agonists in Hair in Asthmatic Patients (CorticHair)

This feasibility study will be open-label with two dose groups: patients receiving budesonide/formoterol Turbuhaler® at a total daily dose \[400 to 800 µg\[ (group 1) and patients receiving a total daily dose ≥800 µg/day (group 2) to investigate whether there is a relationship between dose and hair concentration. The objective of this feasibility study is to determine if the product administered to the patient is detectable and quantifiable in hair in order to have a mean to monitor adherence to the treatment. This study does not in any way evaluate the efficacy or safety of the medicinal product, which will be used in accordance with its marketing authorization.