Klonopin 2 mg is a benzodiazepine medication used to treat panic attacks and various anxiety disorders. It affects certain chemical messengers in the central nervous system (CNS), working against tension and agitation to help you achieve a sense of calm. It is a tranquilizer that provides relaxation and helps prevent panic attacks. In a panic attack, the sufferer is likely to lose control, live in fear of having another attack, and become very depressed.