Both the ADA and the FMLA protect employees who have mental impairments. Under the FMLA, eligible employees can take intermittent FMLA leave when "medically necessary" due to a "serious condition." Under the ADA, a disability includes a mental impairment that substantially limits one or more of an individual’s major life activities. A reasonable accommodation for bipolar disorder may include a leave of absence or a modified work schedule. I suggest that you inform your employer, in writing, that you have been diagnosed with a condition that qualifies as a disability under the ADA and that you are requesting a reasonable accommodation, such as intermittent leave.