acrivastine + pseudoephedrine hydrochloride · Medicine question

How quickly does the pseudoephedrine in Benadryl Allergy Relief Plus Decongestant Capsules produce its decongestant effect, and how long does it last?

iatroX medicinesPublished 8 November 2026

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The pseudoephedrine in Benadryl Allergy Relief Plus Decongestant Capsules produces its decongestant effect within 30 minutes, lasting at least four hours.

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Benadryl Allergy Relief Plus Decongestant CapsulesMcNeil Products Ltd · emc · SmPC §5.1 Pharmacodynamic properties · Version 9Document updated 30 May 2025

Sources checked 8 November 2026

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