HELP PLEASE

I'm a newbie here and posted this on the general board, but figured I'd post it here too.

My significant other (we've been together for 3+ years) started peg-intron June 2002 & has been taking rebetol, as well as Efexor & Tradazone antidepressents. Last month she started taking Procrit for anemia. Well, within the past few weeks, she has made substantial life changing decisions. I don't know what to do. I feel this could be an effect of the antidepressants but I don't know how to approach her. She will tell me she knows what she's doing.

the decisions I'm talking about is more than just wanting to break up with me. Most of our time together has been magical. The circumstances under which we met were incredible and helped form a very strong foundationn. Some of it along the way became stressful (hey, we all have baggage; both divorced) I have been there for her in every way. I have supported her from the beginning when she told me 3 years ago that she had HCV. I read about it and said, she's worth it. Lately, if I have to admit, sometimes I offered too much help (usually in response to her saying how difficult things were for her dealing with her daughter, work & life in general). Anyway, I believe she is now considering leaving her job, reuniting with her ex who stole from her, and moving out of the country. How's that for life changing decisions. And, this has all developed in the period of the last one to two months. I feel that her ex is exerting a lot of influence on her. And, just two weeks ago, on Valetine's Day she told me how much she loved me and looked forward to a future together.
Aside from giving her space, how do I remind her that her judgment could be impaired by the antidepressants. All the literature on those meds say that it could happen. From the beginning of her therapy, the doctors kept repeating "Don't make any life changing decisions during therapy." How is she allowing herself to do these things and how do I deal with it?
Thanks for your words of wisdome