Acute & delayed systemic hypersensitivity reactions. Not to be used for acute asthma exacerbations; other eosinophilic conditions or relief of acute bronchospasm or status asthmaticus. Asthma-related adverse events or exacerbations; pre-existing helminth infections. Not recommended to discontinue abruptly. Pregnancy & lactation. Childn <12 yr & adolescents <45 kg w/ severe eosinophilic asthma; childn & adolescents <18 yr w/ EGPA & CRSwNP.