: an anorectic amphetamine derivative C12H16F3N with little stimulant effect on the central nervous system formerly used in the form of its hydrochloride to treat obesity but no longer used due to its association with heart valve disease see fen-phen sense 1

Examples of fenfluramine in a Sentence

Recent Examples on the Web
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These cases were reported with fenfluramine or the related dexfenfluramine alone, but never with phentermine alone (phentermine remains on the market). Dr. Keith Roach, oregonlive, 28 Aug. 2023 Subsequent studies estimated that seven out of 10,000 people who took fenfluramine or fen-phen for less than four months developed valve disease, while 35 in 10,000 people who took fenfluramine or fen-phen for more than four months developed valve disease. Dr. Keith Roach, oregonlive, 28 Aug. 2023

Word History

Etymology

fen- (alteration of phen-) + -flur- (alteration of fluor-) + amine

First Known Use

1964, in the meaning defined above

Time Traveler
The first known use of fenfluramine was in 1964

Dictionary Entries Near fenfluramine

Cite this Entry

“Fenfluramine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fenfluramine. Accessed 1 Jan. 2025.

Medical Definition

: an anorectic amphetamine derivative C12H16F3N with little stimulant effect on the central nervous system formerly used in the form of its hydrochloride to treat obesity but no longer used due to its association with heart valve disease see dexfenfluramine, fen-phen sense 1
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