: a crystalline compound C6H7N3O used in treating tuberculosis

Examples of isoniazid 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 of the most common include isoniazid, rifampicin, pyrazinamide and ethambutol. Melissa Rudy, Fox News, 31 Oct. 2024 Two medications used to treat tuberculosis, isoniazid and pyrazinamide, are known to interfere with how your body converts some tryptophan to niacin. Brittany Lubeck, Ms, Rdn, Verywell Health, 1 Aug. 2024

Word History

Etymology

is- + nicotinic acid + hydrazide

First Known Use

1952, in the meaning defined above

Time Traveler
The first known use of isoniazid was in 1952

Dictionary Entries Near isoniazid

Cite this Entry

“Isoniazid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/isoniazid. Accessed 26 Jan. 2025.

Medical Definition

isoniazid

noun
: a crystalline compound C6H7N3O used in treating tuberculosis

called also isonicotinic acid hydrazide

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