---
title: "Metformin vs metformin ER: key differences"
description: "Metformin and metformin ER contain the same medicine, but differ in release, dosing schedule, and stomach side effects. Compare, with clinician guidance."
canonical: "https://www.vitalsvault.com/treatment-learn/metformin-vs-metformin-er"
last-updated: 2026-08-22
---

# Metformin vs metformin ER: key differences

> Metformin and metformin ER contain the same medicine, but differ in release, dosing schedule, and stomach side effects. Compare, with clinician guidance.

---

Canonical HTML: https://www.vitalsvault.com/treatment-learn/metformin-vs-metformin-er
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