Cetirizine · Medicine question

How does cetirizine act on histamine receptors?

iatroX medicinesPublished 8 November 2026

The answer

Answer

Cetirizine is a potent, selective antagonist of peripheral histamine H1 receptors, with no measurable affinity for receptors other than H1 in in vitro receptor-binding studies.

Sources for this answer

Benadryl Allergy One A Day 10mg TabletsMcNeil Products Ltd · emc · SmPC §5.1 Pharmacodynamic properties · Version 17Document updated 15 July 2025

Sources checked 8 November 2026

Explore this learning need in CPDTake this topic to CPD, then choose your learning context and available question library.

Can cetirizine increase the risk of urinary retention in people with prostatic hyperplasia or spinal cord lesions?Do Benadryl Allergy One A Day 10 mg cetirizine tablets contain lactose?Does cetirizine pass into breast milk?How can alcohol or other CNS depressants affect alertness when combined with cetirizine in sensitive patients?How does food affect the absorption of cetirizine?What do prospectively collected pregnancy outcome data show about cetirizine exposure during pregnancy?

loading page…

Answer

Sources for this answer

More questions about Cetirizine

Answer

Sources for this answer

More questions about Cetirizine

Cetirizine

More clinical questions?