Is Hydroxyzine HCL the same drug as Cetirizine HCL? If not why the hydroxyzine warning on Cetirizi?

No, hydroxyzine is not the same as cetirizine. (I'm not sure about the warning on cetirizine).

Hydroxyzine reduces activity in the central nervous system. It also acts as an antihistamine that reduces the natural chemical histamine in the body. Histamine can produce symptoms of sneezing and runny nose, or hives on the skin.

Hydroxyzine is used as a sedative to treat anxiety and tension. It is also used together with other medications given for anesthesia. Hydroxyzine may also be used to control nausea and vomiting.

Hydroxyzine is also used to treat allergic skin reactions such as hives or contact dermatitis.

Cetirizine is an antihistamine that reduces the natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose. It is used to treat cold or allergy symptoms such as sneezing, itching, watery eyes, or runny nose.

Cetirizine is also used to treat itching and swelling caused by hives.

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http://www.drugs.com/hydroxyzine.html

http://www.drugs.com/cetirizine-hcl.html