Buspar is used to treat certain types of generalized anxiety disorder (GAD). It helps improve symptoms of anxiety associated with nervous tension, such as fear, tension, irritability, difficulty concentrating, and sleep problems caused by constant thinking. Buspar works by acting on specific receptors in the brain, balancing the levels of chemicals such as serotonin and dopamine. This mechanism is believed to reduce abnormal brain activity that causes anxiety. Unlike other anti-anxiety medications, Buspar does not cause addiction or physical dependence when used correctly, making it a preferred choice in some cases over other sedative medications.