Dear Abasaki,

Both of those meds are anti-depressants and can cause mania in sensitive people, especially people with bipolar.
For bipolar, usually psychiatrists would prescribe a mood stabilizer along with an antidepresant to keep things from getting out of control.

Yeah, what you describe sounds like what we call racing thoughts and pressured speech.

Mari

Explanation of pressured speech:
http://bipolar.about.com/cs/faqs/f/faq_presspeech.htm