Medscape - Allergic rhinitis, urticaria-specific dosing for Zyrtec ( cetirizine), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancycetirizine (Rx, OTC). Brand and Other Names:Zyrtec, Zyrtec Allergy, moreChildren's Zyrtec Allergy, Children's Zyrtec Hives Relief...