phenformin

noun

phen·​for·​min fen-ˈfȯr-mən How to pronounce phenformin (audio)
: a biguanide C10H15N5 formerly used to treat diabetes but now withdrawn from use because of its link to life-threatening lactic acidosis

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phen-fen
phenformin
phenindione
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Cite this Entry

“Phenformin.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/phenformin. Accessed 7 Jul. 2026.

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