diphenhydramine

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diphenhydramine is an FDA-listed pharmaceutical active ingredient.

Key facts

INN diphenhydramine

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What is diphenhydramine?

diphenhydramine is an FDA-listed pharmaceutical active ingredient.

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This profile compiles public regulatory and patent records for informational use by pharmaceutical professionals. It is not medical advice, not investment advice, and not an official FDA, EMA, USPTO, SEC, or NIH record. NovaPharmaNews does not represent any manufacturer, sponsor, or regulator unless explicitly stated in a separate agreement.

Patent expiry and loss-of-exclusivity dates may be estimates when derived from grant date or bulk patent metadata. Confirm material dates against the USPTO, FDA Orange Book, or counsel before contractual or regulatory decisions.

Verify critical facts using the primary sources below. See our data sources policy (methodology) and privacy policy.

Last data refresh: May 26, 2026

FDA openFDA (Drugs@FDA)
SEC EDGAR
ClinicalTrials.gov
USPTO PatentsView

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