Are obsessive-compulsive disorder (OCD) and schizophrenia comorbid?

Updated: Mar 16, 2018
  • Author: Frances R Frankenburg, MD; Chief Editor: Glen L Xiong, MD  more...
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A number of patients with schizophrenia display obsessive-compulsive symptoms, such as the need to check, count, or repeat certain activities. As is similar to anxiety or depression, the connection between these symptoms and schizophrenia is not understood. Obsessive-compulsive symptoms are a known adverse effect of some antipsychotic medications, particularly clozapine. Patients with schizophrenia and obsessive-compulsive symptoms tend to do more poorly. There is no clear consensus on how to treat the obsessive-compulsive symptoms.

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