Other name for metformin?

What other names does metformin go by?

Metformin is also commonly referred to by its brand names, which vary by country. Common brand names include:

- Glucophage
- Glucophage XR
- Riomet

Another term you may see in prescriptions or listings is the drug’s generic “metformin” salt/formulations, such as:
- Metformin hydrochloride (metformin HCl)
- Metformin extended-release (often written as “metformin ER” or “metformin XR”)

How can I tell which “metformin” someone means (XR vs regular)?

• “XR” or “ER” means extended-release (a slower-release form), while the plain “metformin” usually means the immediate-release version.