Montelukast · Medicine question

How does gemfibrozil affect exposure to montelukast?

iatroX medicinesPublished 8 November 2026

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Gemfibrozil increases systemic exposure to montelukast 4.4-fold; no routine montelukast dose adjustment is required, but physicians should be aware of potentially increased adverse reactions.

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Singulair Paediatric 5 mg Chewable TabletsOrganon Pharma (UK) Limited · emc · SmPC §4.5 Interaction with other medicinal products · Version 19Document updated 6 October 2022

Sources checked 8 November 2026

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