ceftriaxone

noun

cef·​tri·​ax·​one ˌsef-ˌtrī-ˈak-ˌsōn How to pronounce ceftriaxone (audio)
: a broad-spectrum semisynthetic cephalosporin antibiotic C18H18N8O7S3 administered parenterally in the form of its sodium salt

Examples of ceftriaxone 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.
The cephalosporin ceftriaxone is the last drug standing in the US to treat gonorrhea infections. — Beth Mole, Ars Technica, 28 Mar. 2024 The current standard of care includes an injection of the antibiotic ceftriaxone, which means patients need to go into a clinic or doctor’s office for treatment. — Jacqueline Howard, CNN Money, 12 Dec. 2025 The analysis also found that resistance to two antibiotics, ceftriaxone and ceftazidime, was high among bacteria found growing in infected wounds. — Mary Kekatos, ABC News, 13 Aug. 2025 If ceftriaxone is unavailable or a person is allergic to ceftriaxone, alternative antibiotics may be used. — Md Published, Verywell Health, 6 May 2025 See All Example Sentences for ceftriaxone

Word History

Etymology

cef- (alteration of cephalosporin) + -triaxone, of unknown origin

First Known Use

1984, in the meaning defined above

Time Traveler
The first known use of ceftriaxone was in 1984

Rhymes for ceftriaxone

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Browse Nearby Words

cee spring
ceftriaxone
ceiba
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Cite this Entry

“Ceftriaxone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ceftriaxone. Accessed 7 Jul. 2026.

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Medical Definition

ceftriaxone

noun
cef·​tri·​ax·​one ˌsef-ˌtrī-ˈak-ˌsōn How to pronounce ceftriaxone (audio)
: a semisynthetic cephalosporin antibiotic that is administered parenterally in the form of its hydrated disodium salt C18H16N8Na2O7S3·3¹/₂H2O
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