Hydroxyzine is an antihistamine medication commonly used to treat anxiety, allergies, and sleep issues. It works by blocking the effects of histamine, a substance in the body that causes allergic symptoms. Hydroxyzine can also help reduce tension and promote relaxation, making it useful for patients before surgery or medical procedures. In addition to its use for anxiety and allergies, hydroxyzine may be prescribed to manage nausea and vomiting or to enhance the effects of other medications. It is available in various forms, including tablets and liquid, and should be taken as directed by a healthcare provider.