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 The cephalosporin ceftriaxone is the last drug standing in the US to treat gonorrhea infections. Beth Mole, Ars Technica, 28 Mar. 2024 Since the advent of antibiotics, Neisseria gonorrhoeae has developed resistance to each class of antibiotics the medical community has used to combat it, leaving ceftriaxone as the sole remaining drug that can reliably cure gonorrhea. Helen Branswell, STAT, 1 Nov. 2023 But to experts, that reduced susceptibility indicated ceftriaxone could also be on its way out. WIRED, 1 Feb. 2023 For years, global surveillance data collected by the World Health Organization has shown that gonorrhea is becoming more and more resistant to our entire lineup of drugs, including frontline drugs like ceftriaxone. Beth Mole, Ars Technica, 20 Jan. 2023 Gonorrhea used to be treated with a class of antibiotics called fluoroquinolones, but is now primarily treated with cephalosporins (which include the aforementioned ceftriaxone). Korin Miller, SELF, 24 Jan. 2023 The case, identified in Massachusetts, was successfully treated with ceftriaxone, an antibiotic recommended to treat the disease, state health officials said in a news release. Erin Prater, Fortune, 20 Jan. 2023 In 2010, the agency updated its treatment guidance to recommend the use of ceftriaxone to treat the disease. Orlando Mayorquin, USA TODAY, 19 Jan. 2023 Severe cases of Lyme disease can involve cardiac or neurological symptoms and are often treated with the intravenous antibiotic ceftriaxone. Christopher Linstrom, Discover Magazine, 31 Jan. 2011

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'ceftriaxone.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


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

Dictionary Entries Near ceftriaxone

Cite this Entry

“Ceftriaxone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ceftriaxone. Accessed 18 Jul. 2024.

Medical Definition


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
Last Updated: - Updated example sentences
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