It is an oral tablet. Klonopin is used to treat Anxiety and panic disorder. It belongs to a class of drugs. It is called a benzodiazepine. It works by calming your nerves and It can create feelings of relaxation. Take this medicine directly by mouth. Do not take more time. Klonopin side effects can include drowsiness, Dizziness, Agitation, and Confusion. Klonopin Is available in 1mg and 2mg.