Guanfacine hydrochloride is primarily used in the treatment of attention deficit hyperactivity disorder (ADHD) in children and adolescents. It helps improve attention span, reduce impulsivity, and manage hyperactivity by affecting certain receptors in the brain. Additionally, it is sometimes prescribed to manage high blood pressure in adults, as it works by relaxing blood vessels and reducing heart rate. Off-label uses may include addressing anxiety, tic disorders, or insomnia in certain cases. Its extended-release formulation is particularly favored for ADHD management due to its once-daily dosing convenience.