It is a class of drugs called benzodiazepine. It is used to treat anxiety and panic disorder. It works by calming your nervous system. when you are depressed it can give you feelings of relaxation. You take this directed by mouth with or without food. Do not take more time. Klonopin side effects may include drowsiness, dizziness, feeling tired, depressed, etc. Klonopin is available in 1mg and 2mg.