Both zyprexa(olanzapine) and risperidone are standard treatments for psychosis and schizophrenia. They both have good effect on positive symptoms and partial effect on negative symptoms. There is low but possible risk of emergence of OCD with olanzapine. Any change in antipsychotic should be done after discussion with your Psychiatrist depending on the detailed case history and other factors to prevent relapse of symptoms in the process. There are other options to manage Obsessions without making a switch also. Please have a detailed discussion with your Psychiatrist before planning change in anytipsychotic.

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