diphenhydramine
An antihistamine and anticholinergic drug that blocks the effect of histamine at H₁…An antihistamine and anticholinergic drug that blocks the effect of histamine at H₁ receptor sites, relieving allergy symptoms. It also reduces smooth muscle contraction, increases heart rate, and sedates the user by blocking muscarinic acetylcholine receptors (mAChRs).
Meaning
1 senses(countable, uncountable)An antihistamine and anticholinergic drug that blocks the effect of histamine at H₁ receptor sites, relieving allergy symptoms. It also reduces smooth muscle contraction, increases heart rate, and sedates the user by blocking muscarinic acetylcholine receptors (mAChRs).
Diphenhydramine is a convenient and cheap antihistamine for use, but there are other drugs that do not make the user tired.
- antihistamine (trade name Benadryl) used to treat allergic reactions involving the nasal passages (hay fever) and also to treat motion sickness
Forms
plural: diphenhydramines| Singular | diphenhydramine |
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| Plural | diphenhydramines |
regular
Synonyms
2 synonymsLessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable