diphenhydramine hydrochloride + paracetamol · Medicine question

How long after oral administration does the diphenhydramine in Panadol NightPain reach peak plasma concentrations?

Name: How long after oral administration does the diphenhydramine in Panadol NightPain reach peak plasma concentrations?
Published: 2026-11-08T13:47:11.808Z

iatroX medicinesPublished 8 November 2026

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The diphenhydramine in Panadol NightPain reaches peak plasma concentrations 2 to 3 hours after oral administration.

Sources for this answer

Panadol NightPainHaleon UK Trading Limited · emc · SmPC §5.2 Pharmacokinetic properties · Version 16Document updated 26 February 2025

Sources checked 8 November 2026

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