Do not use as treatment for acute asthma attacks. Should not be abruptly substituted for inhaled or oral corticosteroids. Evaluate treatment regimen in case of eosinophilia, vasculitic rash, worsening pulmonary symptoms, cardiac complication &/or neuropathy. Reports of serious neuropsychiatric events; drowsiness or dizziness. Pregnancy & lactation. Chewable tab: Not recommended as monotherapy in patients w/ moderate persistent asthma. Contains aspartame; may be harmful for phenylketonurics. FC tab: Not to be taken by patients w/ rare hereditary problems of galactose intolerance, Lapp lactase deficiency or glucose-galactose malabsorption.