antihistamine
noun
an·ti·his·ta·mine
ˌan-tē-ˈhi-stə-ˌmēn 
-mən,
ˌan-tī-
: any of various compounds that counteract histamine in the body and that are used for treating allergic reactions (such as hay fever) and cold symptoms
antihistamine
adjective
Examples of antihistamine in a Sentence
Recent Examples on the Web
Your healthcare provider will explain when to use an antihistamine versus an EpiPen.2
3.
—
Wendy Wisner, Health, 17 Apr. 2025
Decades later, when over-the-counter antihistamines like Benadryl became popular, some parents began using them, off-label, as a sleep aid.
—ArsTechnica, 8 Apr. 2025
Oral antihistamines, for example, can help relieve sneezing, itching, a stuffy or runny nose, and watery eyes.
—Nora Colomer, FOXNews.com, 5 Apr. 2025
There are two main categories of OTC drugs often touted by allergists for alleviating allergy symptoms: oral antihistamines and nasal corticosteroids.
—Erica Sloan, SELF, 2 Apr. 2025
See All Example Sentences for antihistamine
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Wendy Wisner, Health, 17 Apr. 2025
Decades later, when over-the-counter antihistamines like Benadryl became popular, some parents began using them, off-label, as a sleep aid.
—ArsTechnica, 8 Apr. 2025
Oral antihistamines, for example, can help relieve sneezing, itching, a stuffy or runny nose, and watery eyes.
—Nora Colomer, FOXNews.com, 5 Apr. 2025
There are two main categories of OTC drugs often touted by allergists for alleviating allergy symptoms: oral antihistamines and nasal corticosteroids.
—Erica Sloan, SELF, 2 Apr. 2025
See All Example Sentences for antihistamine
Cite this Entry
“Antihistamine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antihistamine. Accessed 23 Apr. 2025.
Copy CitationKids Definition
antihistamine
noun
an·ti·his·ta·mine
ˌant-i-ˈhis-tə-ˌmēn
-mən,
ˌan-ˌtī-
: any of various drugs used for treating allergic reactions and cold symptoms
Medical Definition
antihistamine
1 of 2 adjective
an·ti·his·ta·mine
ˌant-i-ˈhis-tə-ˌmēn, ˌan-ˌtī-, -mən
: tending to block or counteract the physiological action of histamine
human blood lacks antihistamine activity
antihistamine
2 of 2 noun
: any of various compounds that oppose the actions of histamine and are used especially for treating allergic reactions (as hay fever), cold symptoms, and motion sickness
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