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Medicines foscarnet sodium hexahydrateQuestion & answer

foscarnet sodium hexahydrate · Medicine question

Why is it used when aciclovir has not worked?

iatroX medicinesPublished 20 August 2026Reviewed 20 August 2026

The answer

Answer

It blocks viral polymerase directly and does not need activation by viral thymidine kinase, a pathway commonly involved in aciclovir resistance.

Sources for this answer

Foscarnet sodium Tillomed 24 mg/ml solution for infusionemc · SmPC Current selected SmPC · Version 2

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The full medicine guide

foscarnet sodium hexahydrate

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