Additional Study Information: The study will have half of the participants randomly assigned to receive placebo (a sugar pill) and the other half will receive clonazepam medication. For the first 5 nights participants will stay inpatient at the New York State Psychiatric Institute Inpatient unit. Then they will be discharged and continue to receive medication or placebo for the 12 weeks of the outpatient part of the study. For these outpatient 12 weeks they will come to the clinic 2 times per week.