Clonazepam as far as I know it is a muscle relaxant, also prescribed to help some people sleep, I have been prescribed this myself for nervousness and anxiety. It belongs in the Benzodiazepine family of drugs. They work as a depressant on the body/CNS.
I am not a doctor and this is not a doctors guide to health. The info contained may not be correct but to the best of my knowledge it is correct.