Beta-blockers in asthma: myth and reality.

Introduction: Patients with asthma often have important co-morbidities which reduce the likelihood of gaining optimal asthma control. Beta2-blockers are commonly prescribed for the treatment of different clinical indications, including coronary artery disease, cardiac arrhythmia, arterial hypertension, heart failure and glaucoma. Areas covered: The aim of this reviw is to summarize current evidence on the effect of systemic and local β-blockers on asthma outcomes based on their pharmacologic properties,and to help clinicians when prescribing for patients with asthma and co-morbidities. Current data suggest that risk of asthma worsening from systemic and local use of non-selective β-blockers outweighs any potential benefits for their clinical indications. Recent studies confirm that topical and systemic prescription of cardio-selective β-blockers is not associated with a significant increased risk of moderate or severe asthma exacerbations. Expert opinion: Non-selective β-blockers should not be prescribed for the management of comorbidities in patients with asthma while cardio-selective β-blockers, preferably in low doses, may be used when strongly indicated and other therapeutic options are not available. More prospective real-life studies are needed to evaluate the risk of long-term use of β-blockers in patients with asthma.