The designation was based on data from the Phase 2b PATHWAY trial that evaluated 3 doses of tezepelumab as add-on therapy in patients with a history of asthma exacerbations and uncontrolled asthma receiving inhaled corticosteroids/long-acting β-agonist with or without oral corticosteroids and additional asthma controllers vs placebo.
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The FDA designation was supported by data from 7 studies evaluating the safety and efficacy of Xolair against various food allergens (eg, peanut, milk, egg, others).
The randomized, double-blind, placebo-controlled study (N=331) achieved its primary endpoint and key secondary endpoints in the intent-to-treat (ITT) population.