Klonopin is a prescription medication for seizures, panic attacks, anxiety, and panic disorder. Because it is a benzodiazepine, it acts as a central nervous system depressant, relaxing the brain and nerve cells. As a result, it has calming and relaxing properties and reduces brain excitability. As a result, Klonopin has been recognized as a first-line treatment for seizure prevention and control, anxiety, and panic disorder by the FDA.