Atarax is a brand name for the medication hydroxyzine, which is an antihistamine. It's commonly used to treat anxiety, nausea, and allergies, and it can also be prescribed as a sedative before surgeries or medical procedures.

Hydroxyzine works by blocking histamine receptors in the body, helping to reduce symptoms of allergies and anxiety. It may cause drowsiness, so it's important to use it with caution, especially if you need to drive or operate machinery. As always, it's best to follow your healthcare provider's recommendations regarding dosage and use.