fentanyl

noun

fen·​ta·​nyl ˈfen-tə-ˌnil How to pronounce fentanyl (audio)
: a synthetic opioid narcotic analgesic C22H28N2O with pharmacological action similar to morphine that is administered transdermally as a skin patch and in the form of its citrate C22H28N2O·C6H8O7 is administered orally or parenterally (as by intravenous or epidural injection)

Examples of fentanyl 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.
TikTok, one particularly problematic Chinese export, is mental fentanyl designed to addict the Western masses and dupe them into poisonous ideologies—and Communist Party spyware, to boot. David Faris, MSNBC Newsweek, 11 Apr. 2025 Mallery died unexpectedly at age 43 after using cocaine laced with fentanyl, Jackie confirmed in an Instagram post shared on the page of her nonprofit, Victoria's Voice Foundation, on Tuesday, April 8. Natalia Senanayake, People.com, 8 Apr. 2025 Gary man gets 9 years for dealing fentanyl A Gary man got nine years on March 21 for dealing fentanyl to an undercover informant. Meredith Colias-Pete, Chicago Tribune, 7 Apr. 2025 The executive order signed by Trump this week cites fentanyl as a major factor in his decision to close the trade loophole. Brian Mann, NPR, 5 Apr. 2025 See All Example Sentences for fentanyl

Word History

Etymology

probably alteration of phenethyl, a monovalent radical derived from ethylbenzine, from phen- + ethyl

First Known Use

1964, in the meaning defined above

Time Traveler
The first known use of fentanyl was in 1964

Browse Nearby Words

Cite this Entry

“Fentanyl.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fentanyl. Accessed 23 Apr. 2025.

Medical Definition

fentanyl

noun
fen·​ta·​nyl ˈfent-ᵊn-ˌil How to pronounce fentanyl (audio)
: a synthetic opioid narcotic analgesic C22H28N2O with pharmacological action similar to morphine that is administered transdermally as a skin patch and in the form of its citrate C22H28N2O·C6H8O7 is administered orally or parenterally

Note: Fentanyl is marketed under the trademark Actiq.

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