Clonidine is a medication used to treat high blood pressure, attention deficit hyperactivity disorder (ADHD), and anxiety. There are several synonyms for clonidine that can be used interchangeably. These include Catapres, Kapvay, Duraclon, and Nexiclon. Catapres and Kapvay are commonly used for treating ADHD, while Duraclon and Nexiclon are often used to manage pain. Additionally, there are several generic versions of clonidine available that can be prescribed by a doctor. It's important to always use the medication as directed by a healthcare provider and to always consult with a medical professional before making any changes to medication dosages or regimens.