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Zyrtec (cetirizine) is classified as a second generation antihistamine. It is believed to antagonize peripheral H1 receptors and not cross the blood brain barrier (this is why it is less drowsy then other antihistamines). The side effects of Zyrtec such as dry mouth may suggest that it does have some anticholinergic properties.

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Germaine Erdman

Lvl 10
3y ago

What else can I help you with?