Bilastine is primarily used as an antihistamine to treat symptoms associated with allergic conditions. It is effective in managing allergic rhinitis, including seasonal and perennial forms, by reducing symptoms such as sneezing, nasal congestion, and itchy or runny nose. Additionally, it is used to alleviate symptoms of chronic spontaneous urticaria, such as itching and hives. Bilastine is favored for its non-sedative properties, making it suitable for daily use without causing significant drowsiness. It is typically administered orally, offering a convenient treatment option for patients seeking relief from allergic reactions.