Efficacy and Safety Study of Benralizumab in Adults and Adolescents Inadequately Controlled on Inhaled Corticosteroid Plus Long-acting β2 Agonist

Inclusion Criteria:

1. Provision of informed consent prior to any study specific procedures

2. Female and male aged 12 to 75 years, inclusively, at the time of Visit 1

3. History of physician-diagnosed asthma requiring treatment with medium-to-high dose
ICS (>250µg fluticasone dry powder formulation equivalents total daily dose) and a
LABA, for at least 12 months prior to Visit 1.

4. Documented treatment with ICS and LABA for at least 3 months prior to Visit 1 with or
without oral corticosteroids and additional asthma controllers. The ICS and LABA can
be parts of a combination product or given by separate inhalers. The ICS dose must be
greater than or equal to 500 μg/day fluticasone propionate dry powder formulation or
equivalent daily. For ICS/LABA combination preparations, the mid-strength approved
maintenance dose in the local country will meet this ICS criterion.

Exclusion criteria:

1. Clinically important pulmonary disease other than asthma (e.g. active lung infection,
COPD, bronchiectasis, pulmonary fibrosis, cystic fibrosis, hypoventilation syndrome
associated with obesity, lung cancer, alpha 1 anti-trypsin deficiency, and primary
ciliary dyskinesia) or ever been diagnosed with pulmonary or systemic disease, other
than asthma, that are associated with elevated peripheral eosinophil counts (e.g.
allergic bronchopulmonary aspergillosis/mycosis, Churg- Strauss syndrome,
hypereosinophilic syndrome)

2. Any disorder, including, but not limited to, cardiovascular, gastrointestinal,
hepatic, renal, neurological, musculoskeletal, infectious, endocrine, metabolic,
haematological, psychiatric, or major physical impairment that is not stable in the
opinion of the Investigator and could:

- Affect the safety of the patient throughout the study

- Influence the findings of the studies or their interpretations

- Impede the patient's ability to complete the entire duration of study

3. Acute upper or lower respiratory infections requiring antibiotics or antiviral
medication within 30 days prior to the date informed consent is obtained or during
the screening/run-in period

4. Any clinically significant abnormal findings in physical examination, vital signs,
haematology, clinical chemistry, or urinalysis during screening/run-in period, which
in the opinion of the Investigator, may put the patient at risk because of his/her
participation in the study, or may influence the results of the study, or the
patient's ability to complete entire duration of the study