Hydroxyzine 2HCl is primarily used as an antihistamine to treat allergic reactions, such as itching, hives, and skin rashes. It is also effective in managing anxiety and tension due to its sedative properties, often prescribed to help patients with generalized anxiety disorder or before medical procedures to reduce nervousness. Additionally, it is utilized as a premedication to prevent nausea and vomiting in surgical or anesthesia settings. In some cases, it is prescribed to alleviate symptoms of motion sickness. Its calming effects make it useful for managing insomnia, particularly when anxiety is a contributing factor. It is also occasionally used in dermatology to relieve itching caused by chronic skin conditions like eczema or dermatitis.