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Cetirizine is a second-generation peripherally selective antihistamine used to treat allergic rhinitis, dermatitis, urticaria (hives), and runny nose. It is taken by mouth. Effects generally begin within thirty minutes and last for about a day. The degree of benefit is similar to other antihistamines such as diphenhydramine, which is a first-generation antihistamine.
Also known as: Zyrtec, Cetirizine hcl, Childrens zyrtec
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