PREGNANCY: Montelukast crosses the placenta into the fetus following oral administration to animals, but there have been no adequate studies in pregnant women to determine the effects on the fetus. Physicians may prescribe zafirlukast during pregnancy if it is felt that its benefits outweigh the potential but unknown risks to the fetus.
Before using montelukast, tell your doctor if you are allergic to any drugs (especially aspirin). You may need a dose adjustment or special tests to safely use this medication.
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