The Family and Medical Leave Act (FMLA) does not actually require any accomodations in terms of duties, structure or conditions of job, etc.; all FMLA does is give a qualifying employee, working for a qualifying business, the right to take up to 12 weeks of unpaid medical leave. However, employers don't need to alter the job.IF your condition qualifies as a "disability"--and not all illnesses or medical conditions do--then an employer may have to make reasonable accomodations, if possible, to your condition. However, what is reasonable is a largely a matter of judgment. For example, say that you *can* do your "complex" job. If you can do it, then even if it might be easier for you to have a lesser position, your employer might not be required to transfer you--after all, if you can do the job safely, perhaps you don't need an accomodation.If you believe that your condition may qualify as a disability, or just want to check, and also want to see what accomodations might be reasonable, you should speak with experienced employment counsel.