
DRUG INTERACTIONS: Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: other asthma drugs, certain drugs which stimulate liver metabolism (e.g., phenytoin, phenobarbital, carbamazepine), rifamycin antibiotics (e.g., rifampin). Do not start or stop any medicine without doctor or pharmacist approval.


USES: This medication is used to control chronic asthma and help decrease the number of asthma attacks. It is also used to treat hay fever (seasonal allergic rhinitis). This drug improves asthma and hay fever symptoms by blocking substances in the body called leukotrienes.

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