diphenhydramine
noun
di·phen·hy·dra·mine
ˌdī-ˌfen-ˈhī-drə-ˌmēn 
: an antihistamine C17H21NO used especially in the form of its hydrochloride
Examples of diphenhydramine in a Sentence
Recent Examples on the Web
Ask your provider about taking an antihistamine, such as Benadryl (diphenhydramine), to help with swelling or itching.
—
Carrie Madormo, Verywell Health, 5 June 2025
Antihistamines: Oral antihistamines like Benadryl (diphenhydramine) can be effective if your itch is due to an allergic reaction.
—Sarah Jividen, Health, 22 May 2025
While on trial, defense lawyer Megan Kau argued that others, including Anna or Abigail’s father, could have given diphenhydramine to the infant.
—Becca Longmire, People.com, 12 May 2025
Antihistamines: These medications, such as Benadryl (diphenhydramine), can relieve mild food allergies.
—Wendy Wisner, Health, 18 Apr. 2025
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Carrie Madormo, Verywell Health, 5 June 2025
Antihistamines: Oral antihistamines like Benadryl (diphenhydramine) can be effective if your itch is due to an allergic reaction.
—Sarah Jividen, Health, 22 May 2025
While on trial, defense lawyer Megan Kau argued that others, including Anna or Abigail’s father, could have given diphenhydramine to the infant.
—Becca Longmire, People.com, 12 May 2025
Antihistamines: These medications, such as Benadryl (diphenhydramine), can relieve mild food allergies.
—Wendy Wisner, Health, 18 Apr. 2025
See All Example Sentences for diphenhydramine
Cite this Entry
“Diphenhydramine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diphenhydramine. Accessed 8 Jun. 2025.
Copy CitationMedical Definition
diphenhydramine
noun
di·phen·hy·dra·mine
ˌdī-ˌfen-ˈhī-drə-ˌmēn
: an antihistamine used especially in the form of its hydrochloride C17H21NO·HCl to treat allergy symptoms and motion sickness and to induce sleep see benadryl
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