diphenhydramine
/ˌdʌɪfɛnˈhʌɪdrəmiːn
/noun [mass noun] Medicine
An antihistamine compound used for the symptomatic relief of allergies.
- A synthetic amine, usually used as a hydrochloride salt; chemical formula: C17H21NO.
- Amitriptyline, diazepam and diphenhydramine (in Tylenol PM) are considered risky for older individuals.
- The sedating antihistamine diphenhydramine is found in Benadryl, Tylenol PM and Sominex.
Origin
1940s: from diphen- (denoting the presence of two phenyl groups) + hydr- + amine.
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