Alpha-2 agonists are used to treat high blood pressure, attention deficit hyperactivity disorder (ADHD), and muscle spasticity. They also have other uses, such as treating certain eye conditions and managing opioid withdrawal symptoms. Alpha-2 agonists work by stimulating alpha-2 receptors in your brain, which helps to reduce nerve signals that can cause symptoms. These medications come in different forms, including oral pills and eye drops. Examples include clonidine (Catapres, Kapvay), guanfacine (Intuniv), tizanidine (Zanaflex), and brimonidine (Alphagan P, Lumify). You can choose the form that best fits your needs.