phen·​ter·​mine | \ ˈfen-tər-ˌmēn How to pronounce phentermine (audio) \

Definition of phentermine

: an anorectic drug C10H15N used in the form of its hydrochloride to treat obesity

Examples of phentermine in a Sentence

Recent Examples on the Web Lingering safety doubts persist after several high-profile withdrawals, including the combination drug fenfluramine/phentermine in 1997, Meridia (sibutramine) in 2010, and Belviq (lorcaserin) in early 2020. Joshua Cohen, Forbes, 5 June 2021 During three of those years, Ramírez allegedly prescribed the man 600 tablets of the sedative Ambien, 940 pills of the narcotic Norco and 660 phentermine tablets. Matthias Gafni, San Francisco Chronicle, 21 May 2020 Many stimulants are specifically marketed as antiobesity drugs, including phentermine and lisdexamfetamine dimesylate (Vyvanse), which earlier this year became the first drug approved for the treatment of binge-eating disorder. Andrea Alfano, Scientific American, 1 July 2015 Weight loss drugs approved for long-term use include orlistat (brand name Xenical), lorcaserin (Belviq) and liraglutide (Saxenda) as well as the combination drugs naltrexone-bupropion (Contrave) and phentermine-topiramate (Qsymia). Jacqueline Howard, CNN, 15 Jan. 2020 She was found in possession of phentermine in a prescription bottle that did not belong to her, police reported. Jennifer James, Houston Chronicle, 21 Aug. 2019 Ethanol is alcohol, and phentermine is a diet medication. Tom Steele, Dallas News, 2 Aug. 2019 Take, for example, the diet drugs fenfluramine and dexfenfluramine (when combined with phentermine they were commonly known as fen-phen). Neile Grayson, STAT, 2 May 2018 In 1997, a combo drug containing fenfluramine and phentermine, or fen-phen, was pulled off the market after reports of heart valve damage and deaths. Bradley J. Fikes,, 23 Apr. 2018 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'phentermine.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of phentermine

1961, in the meaning defined above

History and Etymology for phentermine

probably from phenyl + tert- (from tertiary) + amine

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The first known use of phentermine was in 1961

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Cite this Entry

“Phentermine.” Dictionary, Merriam-Webster, Accessed 8 Aug. 2022.

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More Definitions for phentermine


phen·​ter·​mine | \ ˈfen-tər-ˌmēn How to pronounce phentermine (audio) \

Medical Definition of phentermine

: an anorectic drug administered in the form of its hydrochloride C10H15N·HCl to treat obesity


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