Efficacy and Safety of 4 Doses of QGE031 in Patients 18-50 Years of Age With Peanut Allergy

Main Inclusion Criteria: * Diagnosis of acute peanut allergy as manifested by urticaria, angioedema, gastro-intestinal or respiratory tract symptoms, with acute onset of symptoms after ingestion (up to 2 hours). * Positive peanut food challenge at baseline, i.e., have objective allergic events at a level of 300mg (not cumulative) or below of peanut protein but not to the placebo test. Main Exclusion Criteria: * Prior exposure to any monoclonal antibody treatment * Asthma patients on maintenance long acting beta-agonists * Use of systemic corticosteroids * Concomitant use of beta blockers, ACE inhibitors, tiotropium or ipratropium, antidepressants, oral beta-agonists * Use of immunosuppressants within 6 months of visit 1 Other protocol-defined inclusion/exclusion criteria may appy