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.
Some states, such as Alabama, have considered legislation that would protect pharmacists from any possible disciplinary action for dispensing ivermectin without a prescription. Beth Mole, ArsTechnica, 10 June 2025 Mississippi’s bill would limit over-the-counter ivermectin to anyone 18 and older. Erika Edwards, NBC news, 9 June 2025 The agency also cautioned people against using ivermectin formulated for animals. Suzanne King, Kansas City Star, 13 May 2025 Trump also takes aspirin daily to prevent heart disease, a multivitamin and applies a cream called ivermectin, as needed, to treat the skin condition rosacea. Justin Gomez, ABC News, 11 Apr. 2025 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 17 Jun. 2025.

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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