Study to Evaluate Tezepelumab in Adults & Adolescents with Severe Uncontrolled Asthma - NAVIGATOR

Inclusion Criteria

• • Age. 12-80
• • Documented physician-diagnosed asthma for at least 12 months
• • Subjects who have received a physician-prescribed asthma controller medication with medium or high dose ICS for at least 12 months.
• • Documented treatment with a total daily dose of either medium or high dose ICS (≥ 500 µg fluticasone propionate dry powder formulation equivalent total daily dose) for at least 3 months.
• • At least one additional maintenance asthma controller medication is required according to standard practice of care and must be documented for at least 3 months.
• • Morning pre-BD FEV1 <80% predicted normal (<90% for subjects 12-17 yrs)
• • Evidence of asthma as documented by either: Documented historical reversibility of FEV1 ≥12% and ≥200 mL in the previous 12 months OR Post-BD (albuterol/salbutamol) reversibility of FEV1 ≥12% and ≥200 mL during screening.
• • Documented history of at least 2 asthma exacerbation events within 12 months.
• • ACQ-6 score ≥1.5 at screening and on day of randomization