ceftriaxone

noun

cef·​tri·​ax·​one ˌsef-ˌtrī-ˈak-ˌsōn 

: 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 current standard of care involves an intramuscular injection of the antibiotic ceftriaxone, which requires a visit to a care facility. —Jacqueline Howard, CNN Money, 14 Apr. 2025

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

Word History

Etymology

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

First Known Use

1984, in the meaning defined above

Rhymes for ceftriaxone

• flaxen
• saxon
• taxon
• waxen
• relaxin

Medical Definition

ceftriaxone

noun

cef·​tri·​ax·​one ˌsef-ˌtrī-ˈak-ˌsōn 

: a semisynthetic cephalosporin antibiotic that is administered parenterally in the form of its hydrated disodium salt C₁₈H₁₆N₈Na₂O₇S₃·3¹/₂H₂O