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Interactions

Authoring team

  • zafirlukast:
    • plasma concentrations increased by aspirin
    • plasma concentrations reduced by erythromycin, theophylline
    • zafirlukast may result in increased prothrombin time if the patient is on warfarin therapy

  • montelukast:
    • plasma concentrations reduced by rifampicin, phenytoin and phenobarbitone

Check the summary of product characteristics before prescribing either of the drugs mentioned.

Reference:

  • MeReC Bulletin (1999), 1, 1-4.

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