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Medicines cefalexinQuestion & answer

cefalexin · Medicine question

What potential interaction can occur between cefalexin and metformin?

iatroX medicinesPublished 8 November 2026

The answer

Answer

Cefalexin may interact with metformin, causing metformin accumulation and potentially fatal lactic acidosis.

Sources for this answer

Cefalexin oral suspension BP 250mg/5mlSandoz Limited · emc · SmPC §4.5 Interaction with other medicinal products · Version 7Document updated 1 November 2019

Sources checked 8 November 2026

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cefalexin

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