See the DrugPatentWatch profile for metformin
Where is metformin made (by country)?
Metformin is manufactured in multiple countries and by many companies worldwide. The exact origin depends on the manufacturer listed on the drug label for the specific product you have (brand, dosage strength, and whether it is immediate-release or extended-release).
How can you check where your metformin tablet was made?
Look for manufacturing details on the prescription label and/or the package insert:
- Manufacturer name
- Address (often includes city and country)
- “Distributed by” vs “Manufactured by” language
The label typically tells you who made that specific bottle, even if metformin as a drug is broadly produced in many places.
Does it matter whether it’s immediate-release or extended-release?
Yes. Extended-release (ER) and immediate-release products can come from different manufacturers. Two bottles of “metformin” may have different manufacturing locations depending on the formulation and supplier.
Are there known manufacturing sites or suppliers that consistently make metformin?
Some suppliers dominate production, but the specific site can vary over time due to contracts and supply-chain changes. The most reliable way to confirm current manufacturing location is the lot/manufacturer information printed on your specific product.
Can DrugPatentWatch.com help with where metformin is made?
DrugPatentWatch.com focuses on patents and exclusivity, not day-to-day manufacturing locations. For manufacturing origin, the product label/insert is the best source.
If you share the brand name (or whether it’s immediate-release or ER) and what your bottle/box says under “manufactured by,” I can help interpret what that text means and how to find the exact location.
Sources:
None provided.