Klonopin and Clonidine are two medications used to treat anxiety, seizures, sleep problems, and high blood pressure. Klonopin is frequently prescribed to treat panic attacks, which are sudden feelings of fear, and provides quick relief by calming the brain and the central nervous system. On the other hand, Clonidine is used to treat high blood pressure and ADHD (Attention-Deficit/Hyperactivity Disorder), as it can help periodically for anxiety or withdrawal symptoms.