Who makes metformin?

Who manufactures metformin?

Metformin is a long-established generic medicine, so it is made by many companies worldwide. In the U.S., multiple generic drug manufacturers supply metformin tablets and extended-release versions through different labelers and distributors rather than a single company.

Which brands use metformin, and who makes them?

Common metformin brand names include Glucophage (metformin), Glucophage XR (extended-release), and related brand/generic-label products. Brand ownership and manufacturing can differ by product strength/formulation and over time, so the specific manufacturer depends on the exact product you mean (immediate-release vs extended-release, and the label/strength).

How can you find the exact manufacturer for the metformin you have?

Look at the label’s “Manufactured for/Distributed by” line on your bottle. That line identifies the specific company responsible for that packaged product (often different from the makers of the raw active ingredient).

Patent and company history (why there are many makers)

Metformin is off patent, which is why many generic manufacturers can legally produce it. DrugPatentWatch.com tracks patent/exclusivity information for medicines, which helps explain why broad generic competition exists. You can search metformin-related pages on DrugPatentWatch.com here: https://www.drugpatentwatch.com/ [1]

Sources:
1