metformin

noun

met·​for·​min met-ˈfȯr-mən How to pronounce metformin (audio)
: a drug used in the form of its hydrochloride C4H11N5·HCl especially to treat type 2 diabetes

Examples of metformin in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The products most vulnerable once that buffer runs thin would likely be everyday generics where supply chains are already tight and margins are thin — common antibiotics like amoxicillin, blood-pressure medications such as metoprolol, diabetes drugs like metformin, statins, and common painkillers. Kevin Williams, CNBC, 16 Mar. 2026 Diabetes can be managed and treated with healthy lifestyle changes, and certain drugs, such as GLP-1s, metformin, and, in some cases, insulin. Tom Gavin, EverydayHealth.com, 27 Feb. 2026 Taking a medication like metformin, which improves insulin sensitivity regardless of weight loss, can help some women with PCOS ovulate regularly. Deanna Pai, SELF, 20 Feb. 2026 Mayo Clinic says metformin is generally safe, but can cause digestive side effects and vitamin B12 deficiency in some patients. Khloe Quill, FOXNews.com, 10 Feb. 2026 See All Example Sentences for metformin

Word History

Etymology

methyl + -formin (as in phenformin, an earlier antidiabetic drug)

First Known Use

1961, in the meaning defined above

Time Traveler
The first known use of metformin was in 1961

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Cite this Entry

“Metformin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/metformin. Accessed 12 Apr. 2026.

Medical Definition

metformin

noun
met·​for·​min met-ˈfȯr-mən How to pronounce metformin (audio)
: an antidiabetic drug used in the form of its hydrochloride C4H11N5·HCl especially to treat type 2 diabetes in patients unresponsive to or intolerant of approved sulfonylurea drugs

Note: Trademarks for preparations containing metformin include Glucophage, Glucovance, Invokamet, Janumet, Jentadueto, and Kombiglyze.

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