Klonopin is a part of a group medication. It belongs to a class of drugs. It is used to treat anxiety and panic disorder. It works by helping to calm your nervous system. Take this medicine when you are feeling depressed. It can create a feeling of relaxation. Take this medicine directed by mouth with or without food. Klonopin is available in 1mg and 2mg. Klonopin side effects may include drowsiness, dizziness, feeling tired, depressed