People with bipolar disorder (manic depression) often have trouble sleeping. This can lead to worsening problems with mood and functioning.

Stanford University is investigating the use of suvorexant for treatment-resistant insomnia in patients with bipolar disorder.

• Participants will have an initial psychiatric exam and will be monitored during the 14-week study by a psychiatrist who specializes in bipolar disorder.

• For one week, participants will add suvorexant or a placebo to their current medication treatment.

• The following week, and for the next 3 months, all participants will receive suvorexant.

• There is no cost to participants and participants will receive some compensation for time and travel.

If you would like more information about this study please call Lauren Chang at 650-498-8459 or email Laurensc@stanford.edu. For information about the Bipolar Disorders Clinic at Stanford University please visit our website at www.bipolar.org.

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For further information regarding questions, concerns, or complaints about research, research related injury, and questions about the rights of research participants, please call (650) 723-5244 or call toll free 1-866-680-2906, or write the Administrative Panel on Human Subjects in Medical Research, Administrative Panels Office, Stanford University, Stanford, CA 94305-5401.