I found this on The Center For Reintegration website under which it listed 5 myths about people with mental illness- especially pertaining to the workplace.

Myth #4: People with psychotic disabilities cannot tolerate stress on the job.
The Facts: The response to job-related stress, and precisely which factors will be perceived as stressful, vary among individuals with psychiatric disabilities just as they do among people without such disabilities. For all workers -- with or without psychiatric disabilities -- productivity is optimized when there is a close match between the employee's needs and his or her working conditions.