Whenever I ever took an antidepressant, before my bipolar dx, and even after when taken with a moodstabilizer and antipsychotic, it caused a mood switch. These were the common scenarios for me:

1. Hypomania (elated) then mixed episode - horrible!

2. Mania (elated or irritable) then mixed episode

3. My moods rapidly shifting from depression to mixed episode, maybe to some elation, to mixed, to depressed, to mixed in a matter of days

All scenarios were unacceptable. I tried many antidepressants over the years and all did one of the three above. They were not only worthless for me, but dangerous.