Acute systemic reactions including anaphylactic & hypersensitivity reactions (eg, urticaria, papular urticaria, rash) may occur w/in hr of administration or delayed onset. Permanently discontinue treatment & initiate appropriate therapy in the event of hypersensitivity reaction. Discontinue treatment if patients become infected while receiving Fasenra & do not respond to anti-helminth treatment, until infection resolves. Not to be used to treat acute asthma exacerbations. Not to be inj into areas where skin is tender, bruised, erythematous, or hardened. Monitor patients for appropriate time after administration of treatment. History of anaphylaxis unrelated to treatment. Patients w/ known helminth infections; treat pre-existing helminth infections before initiating therapy. Seek medical advice if asthma remains uncontrolled or worsens after initiation of treatment. Not recommended to abruptly discontinue corticosteroids after initiation of therapy. Preferable to avoid use during pregnancy. Lactation. Safety & efficacy in childn 6-18 yr have not been established.