diphenhydramine
UK[ˌdʌɪfɛnˈhʌɪdrəmiːn]US[ˌdaɪfɛnˈhaɪdrəˌmin]
n
An antihistamine drug used to treat allergies, motion sickness, and insomnia, and as a cough suppressant.
Morpheme Breakdown
di
phenyl
hydramine
di
two
phenyl
phenyl group
hydramine
hydramine compound
Etymology
The word 'diphenhydramine' is a modern scientific coinage constructed from international scientific vocabulary. It follows a systematic chemical nomenclature logic, literally describing the drug's molecular structure. The prefix 'di-' indicates the presence of two phenyl groups. The 'hydramine' portion signals it is an ethanolamine derivative, a compound containing an amine group linked to a hydroxyl group (water-related). Thus, the name transparently builds from its chemical components—two phenyl rings attached to a hydramine structure—to form the specific, abstract identifier for this pharmaceutical agent.
Analysis
Structure: di (two) + phenyl (phenyl group) + hydramine (hydramine compound)
di: A prefix of Greek origin (via Latin) meaning "two" or "double". It functions as a numerical modifier.
phenyl: A combining form derived from Greek phaino (to show, bring to light), via German Phenyl, referring to a univalent hydrocarbon radical (C₆H₅) derived from benzene. It functions as the core chemical group identifier.
hydramine: A combining form from Greek hydor (water) and the chemical suffix -amine (indicating a compound derived from ammonia). It functions as the core compound name.
Examples
Diphenhydramine is the active ingredient in many over-the-counter sleep aids.
For allergic reactions, a doctor may recommend taking diphenhydramine.
Common side effects of diphenhydramine include drowsiness and dry mouth.