Inhaler Adherence in COPD: A Crucial Step Towards the Correct

COPD is a typical example of chronic disease. As such, treatment adherence tends to be as low as between 30% and 50%, with specific issues in COPD due to the use of inhaled therapies. Decreased adherence in COPD is associated with worse outcomes, with increased risk for exacerbations and long-term mortality. Factors that impact adherence are multiple, some related to patient, some related to clinicians and finally some related to healthcare system. Among clinician factors, prescription of simplified treatment regimens delivered by an inhaler adapted to the patient's characteristics is crucial. Although it has been observed a huge improvement in the design and usability of inhaler devices for COPD in the last two centuries, there is still a clear gap in this field. Smart inhalers as well as simplified treatment regimens could improve adherence and therefore improve long-term outcomes in COPD. Plain Language Summary: Treatment adherence in COPD is crucial as in many other chronic diseases, with specific issues due to inhaled route, and many factors involved. Low adherence in COPD has been linked to an increased risk of exacerbations and future mortality. Many interventions have been developed to improve treatment adherence in COPD. This review summarizes the current knowledge and future prospects for this important aspect of COPD treatment.