I have bipolar and had my surgery April 26th. I had a bout of depression right after but I really believe it was true sadness and anxiety rather than a mood swing. I haven't had any absorption issues. I switched to Wellbutrin HR which can be crushed (it tastes HORRIBLE, just a warning ?).
Overall I feel so much better. I am taking a lot less of my anxiety med and I am generally very stable. Of course period hormones are still an issue, but it isn't as bad.
I also actually get those mythical endorphins from exercising that everyone used to talk about!!