Hydroxyebastine is primarily used as an antihistamine to treat allergic conditions. It is effective in managing symptoms such as sneezing, runny nose, itching, and watery eyes caused by allergies like hay fever or other upper respiratory allergies. Additionally, it is used to alleviate symptoms of chronic urticaria (hives) and other skin-related allergic reactions. Its application helps in reducing the body's histamine response, providing relief from discomfort and improving quality of life for individuals suffering from allergic conditions.