hy·​dral·​azine hī-ˈdra-lə-ˌzēn How to pronounce hydralazine (audio)
: a vasodilator C8H8N4 used in the form of its hydrochloride to treat hypertension

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Example Sentences

Recent Examples on the Web The primary recommended drugs – considered safe for pregnant and recently delivered moms – are both delivered by IV: labetalol and hydralazine. Cara Kelly, USA TODAY, 27 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hydralazine.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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Word History


hydr- + phthalic (acid) + azine

First Known Use

1952, in the meaning defined above

Time Traveler
The first known use of hydralazine was in 1952

Dictionary Entries Near hydralazine

Cite this Entry

“Hydralazine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydralazine. Accessed 28 Sep. 2022.

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Medical Definition



hy·​dral·​azine hī-ˈdral-ə-ˌzēn How to pronounce hydralazine (audio)
: an antihypertensive drug that is used in the form of its hydrochloride C8H8N4·HCl and produces peripheral arteriolar dilation by relaxing vascular smooth muscle

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