I took Effexor, too, at one time, and the withdrawals were bad on it, as well. The devil, Prozac, didn't have that effect on me, but gees, Cymbalta is the worst. Effexor had zero affect on me for depression - they had me taking so much I rattled when I walked. BUT, the withdrawals were really painful.
It's amazing what we do to make ourselves better - but I know myself, personally, would go through just about anything to feel better than the normal bipolar crappola.