Why was Breztri approved?
The approval is based on data from the Phase III Kalos and Logos trials, two replicate confirmatory, randomized, double-blind trials enrolling approximately 4,300 patients with asthma across 24 to 52 weeks.2
The trials evaluated Breztri against dual ICS/LABA therapy in a broad population including patients with and without recent asthma exacerbations. Results were published in The Lancet Respiratory Medicine back in February 2026.
In the trials, Breztri demonstrated a statistically significant and clinically meaningful improvement in lung function compared with dual-combination therapy, measured by forced expiratory volume over one second. In a key secondary endpoint, it also showed a rapid onset of action, with significant improvement in lung function within five minutes of the first dose.2 No new safety or tolerability signals were identified in the trials.
Why does this approval matter?
An estimated 27 million people are living with asthma in the U.S., and around half continue to be uncontrolled on dual maintenance therapies. Poorly controlled asthma contributes to nearly 10 million asthma attacks each year, and the ongoing burden of inflammation and airway tightening causes wheezing, breathlessness, chest tightness, and exacerbations that can be life-threatening.1
Njira Lugogo, MD, clinical professor in the Division of Pulmonary and Critical Care Medicine at the University of Michigan, said, "Despite the availability of dual maintenance therapy, many patients are still at risk for exacerbations and experience daily breathing difficulties, reduced lung function and the ongoing fear of worsening symptoms. The FDA approval of Breztri as the only maintenance triple therapy for people with asthma 12 years of age and older marks a pivotal moment in helping those living with this debilitating disease breathe better, sooner."
Regulatory filings for Breztri in asthma are currently under review in the EU, Japan, and China.1
Sources
- Breztri approved in the US for asthma as first and only triple therapy for patients 12 years of age and older AstraZeneca April 28, 2026 https://www.astrazeneca.com/media-centre/press-releases/2026/breztri-approved-in-the-us-for-asthma.html
- Positive and clinically meaningful results from the Phase III KALOS and LOGOS trials for Breztri in patients with uncontrolled asthma published in The Lancet Respiratory Medicine AstraZeneca February 13, 2026 https://www.astrazeneca.com/media-centre/press-releases/2026/positive-and-clinically-meaningful-results-from-the-phase-iii-kalos-and-logos-trials-for-breztri.html