Thank you very much for your interest in our study. We are attempting to assess the efficacy of Tolcapone vs. placebo for the treatment of obsessive compulsive disorder in adults 18 and older. The study is conducted under Dr. Jon Grant at the University of Chicago and involves a total of six visits over a nine-week period, with three of the visits being virtual. Participants will be compensated for their time and travel. The information you provide here will be kept confidential and will not be used for purposes other than seeing if you are eligible to participate in the study.

If you have additional questions, please call 773-702-5523.

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* 1. Have you been diagnosed with obsessive compulsive disorder?

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* 2. Are you willing to participate in a 9 week clinical trial where you may receive Tolcapone or a placebo?

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* 3. Do you understand English and can respond to questions, both verbally and written, in the language?