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Medicines ColecalciferolQuestion & answer

Colecalciferol · Medicine question

How can phenytoin affect the action of colecalciferol?

iatroX medicinesPublished 8 November 2026

The answer

Answer

Concomitant treatment with phenytoin can decrease the effect of colecalciferol because of metabolic activation.

Sources for this answer

Colextra-D3 800 IU Capsules, SoftSynergy Biologics · emc · SmPC §4.5 Interaction with other medicinal products · Version 1Document updated 24 February 2026

Sources checked 8 November 2026

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Colecalciferol

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