Not to be used for acute asthma attacks. Does not alter the need for patients w/ aspirin-sensitive asthma to avoid taking aspirin & other NSAIDs. Not to be abruptly substituted for inhaled or oral corticosteroids. Not recommended as monotherapy in patients w/ moderate persistent asthma. Systemic eosinophilia, w/ vasculitis consistent w/ Churg-Strauss syndrome. Neuropsychiatric events. Reassess & evaluate treatment regimens for patients who develop eosinophilia, vasculitic rash, worsening pulmonary symptoms, cardiac complications, &/or neuropathy. Periodically evaluate patients for asthma control. Consider as alternative treatment option to low-dose inhaled corticosteroids for childn w/ mild persistent asthma only for those who do not have recent history of serious asthma attacks that required oral corticosteroid use & who have demonstrated incapability of using inhaled corticosteroid. May affect ability to drive & use machines. Severe hepatic impairment. Pregnancy & lactation.