My W has always battled depression. She had one bad panic attack shortly after our second daughter was born. However, impulsivity, paranoia, agitation, and rapid cycling did not really occur until after she was on the anti-depressants. There is an unofficial diagnosis of Bipolar III that is defined by the patient only experiencing the manic symptoms after taking anti-depressants. My diagnosis would be that, but I am not a doctor by any means. She has been off the meds since October and still has bouts with depression, but she manages it. She is still a little impulsive at times, but that is one of the things I love about her
I am going to expound on this a little more. There is very little doubt that my W acted very differently during the time that she was on the AD's. However, this overlapped with the time that she was most involved in her affair. So it is very difficult to discern what was due to the meds and what was due to the affair. She is not sure herself; she told me that she believes that she is "just making better decissions" now. Hope that helps.