To test this hypothesis, we will select 16 patients (6-26 yrs) with a total IgE of 30-1300 IU/ml, sensitivity to at least one allergen, an FEV1 ≥ 60% predicted, and documented poor adherence to ICS with inadequate asthma control. Subjects will be randomized to receive OMB (150-375 mg subcutaneously) or placebo every 2-4 weeks for four months each, in a double-blind, crossover manner with a 3 month washout period between treatments. Spirometry will be measured before each injection and at the end of each treatment period. The concentration of AMP that will provoke a 20% decrease in FEV1 (PC20 FEV1) and a free IgE serum concentration will be measured before and at the end of each treatment period. After randomization, a 5-day course of oral prednisone will be administered whenever bronchodilator-unresponsive symptoms persist or FEV1 is < 60% predicted. ANOVA for repeated measures will be used to evaluate differences between treatments in Δ PC20 (primary endpoint) and Δ FEV1, while the Friedman Statistic will be used to evaluate differences in the number of short courses of prednisone. The results of this study will provide new information on the extent to which OMB decreases airway responsiveness to AMP (i.e. allergic airway inflammation) and whether this new therapy will fill an unmet need for patients who have inadequately controlled asthma because of poor adherence to inhaled corticosteroids.