ampicillin

noun

am·​pi·​cil·​lin ˌam-pə-ˈsi-lən How to pronounce ampicillin (audio)
: a penicillin C16H19N3O4S that is effective against gram-negative and gram-positive bacteria and is used to treat various infections of the urinary, respiratory, and intestinal tracts

Examples of ampicillin in a Sentence

Recent Examples on the Web Listeria is generally treated with the common antibiotic ampicillin. Mark Kortepeter, Forbes, 14 Feb. 2024 Treatment with trimethoprim-sulfamethoxazole is used as an alternative for penicillin-allergic patients (since ampicillin is a penicillin derivative). Mark Kortepeter, Forbes, 14 Feb. 2024 Examples of penicillin drugs are amoxicillin, ampicillin, and oxacillin. Methoxyflurane. Angela Palmer, Verywell Health, 3 May 2023 When an infection is severe enough to require further treatment or hospitalization, there are five antibiotics doctors usually turn to: azithromycin, ciprofloxacin, ceftriaxone, trimethoprimsulfamethoxazole, and ampicillin. Catherine Garcia, The Week, 16 Mar. 2023 The change made the bacteria less sensitive to the antibiotic ampicillin and to attacks from the immune system. Roni Dengler, Discover Magazine, 11 Apr. 2019 Pregnant people who develop symptoms should also be treated with IV ampicillin, according to the American College of Obstetricians and Gynecologists (ACOG). Korin Miller, Health.com, 8 Dec. 2021 In their search, a few other antibiotics were associated with contraceptive failure in three or more case reports, including: ampicillin, amoxicillin, griseofulvin, metronidazole, and tetracycline. Korin Miller, SELF, 27 July 2017 The unidentified infant had contracted group B Streptococcus agalactiae (GBS) during birth and was given an 11-day course of ampicillin, according to a CDC newsletter, which detailed the case. Fox News, 30 June 2017

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

Word History

Etymology

am(ino) + p(en)icillin

First Known Use

1961, in the meaning defined above

Time Traveler
The first known use of ampicillin was in 1961

Dictionary Entries Near ampicillin

Cite this Entry

“Ampicillin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ampicillin. Accessed 27 May. 2024.

Medical Definition

ampicillin

noun
am·​pi·​cil·​lin ˌam-pə-ˈsil-ən How to pronounce ampicillin (audio)
: a penicillin C16H19N3O4S that is effective against gram-negative and gram-positive bacteria and is used in anhydrous forms, as the trihydrate, or as the sodium salt to treat various infections of the urinary, respiratory, and intestinal tracts see penbritin

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