2. Participants meeting DSM-IV-TR criteria for bipolar disorder I or II subtypes or Participants meeting DSM-IV-TR criteria for rapid cycling BD, which is defined by a pattern of presentation accompanied by 4 or more mood episodes in a 12-month period, with a typical course of mania or hypomania followed by depression or vice versa. The episodes must be demarcated by a full or partial remission lasting at least 2 months or by a switch to a mood state of opposite polarity.