Source: Medicines & Healthcare Products Regulatory Agency (GB) Revision Year: 2017 Publisher: Norma Chemicals Ltd., 51-53 Stert Street, Abingdon, Oxfordshire OX14 3JF United Kingdom
Diphenhydramine applied externally has anti-histaminic activity in conditions induced by allergic stimuli.
Diphenhydramine is a histamine H1 receptor antagonist.
External applications to largely intact skin results in minimal systemic absorption.
None stated.
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