ivermectin

noun

iver·​mec·​tin ˌī-vər-ˈmek-tən How to pronounce ivermectin (audio)
: a drug mixture of two structurally similar semisynthetic lactones that is used in veterinary medicine as an anthelmintic, acaricide, and insecticide and in human medicine to treat onchocerciasis

Examples of ivermectin 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.
During the pandemic, compounders charged exorbitant prices for ivermectin, even after the drug proved ineffective against COVID-19. Dhruv Khullar, New Yorker, 6 Apr. 2026 And the Covid-19 pandemic also helped popularize self-experimentation with drugs, as hydroxychloroquine and ivermectin emerged as alternative (but ultimately ineffective) ways to counter the virus. Sarah Todd, STAT, 6 Apr. 2026 Passed a bill that would make the antiparasitic medication ivermectin available without a prescription. Riley Bunch, AJC.com, 3 Apr. 2026 Suspicion turned to anger when scientific leaders kept contradicting his embrace of hydroxychloroquine, ivermectin, and convalescent plasma. David Blumenthal, Fortune, 24 Mar. 2026 See All Example Sentences for ivermectin

Word History

Etymology

perhaps from di- + New Latin avermitilis (specific epithet of Streptomyces avermitilis, bacterium from which it is derived) + English -ect- (of unknown origin) + -in entry 1

First Known Use

1981, in the meaning defined above

Time Traveler
The first known use of ivermectin was in 1981

Browse Nearby Words

Cite this Entry

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

Medical Definition

ivermectin

noun
iver·​mec·​tin ˌī-vər-ˈmek-tən How to pronounce ivermectin (audio)
: a drug mixture of two structurally similar semisynthetic macrocyclic lactones that is a derivative of avermectin used in veterinary medicine as an anthelmintic, acaricide, and insecticide and in human medicine to treat onchocerciasis

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