Bipolar disorder, also known as manic depression, involves serious shifts in moods, energy, thinking, and behavior. Because it looks so similar to depression when in the low phase, it is often overlooked and misdiagnosed. This is a problem, because antidepressants for bipolar depression can make the condition worse. If you’ve ever gone through phases where you experienced excessive feelings of euphoria, a decreased need for sleep, racing thoughts, and impulsive behavior, consider getting evaluated for bipolar disorder.