Inhaler devices in asthma and COPD patients - a prospective cross-sectional study on inhaler preferences and error rates.

Background: Inhalation therapy is the backbone of asthma and COPD control. However, inhaler adherence and device mishandling continue to be a problem in real life. Some studies have shown that using a patient-preferred inhaler may reduce device handling errors and improve adherence to prescribed chronic inhaler drug therapy.