Evaluate the Effect of Omalizumab on Markers of Asthma Impairment in Patients With Persistent Allergic Asthma

Omalizumab was supplied as a lyophilized, sterile powder in a single-use, 5 mL vial. The vial was designed to deliver 150 mg (1.2 mL) of omalizumab for subcutaneous (s.c.) administration after reconstitution with 1.4 mL sterile water for injection. Doses of more than 150 mg were divided among multiple injection sites to limit injections to not more than 150 mg per site.

Placebo was supplied as a lyophilized, sterile powder in a single-use, 5 mL vial. The vial was designed to deliver 150 mg (1.2 mL) of placebo for subcutaneous (s.c.) administration after reconstitution with 1.4 mL sterile water for injection. Doses of more than 150 mg were divided among multiple injection sites to limit injections to not more than 150 mg per site.