I disagree - anything that has withdrawal symptoms, which effexor definitely does, they even list it in the side effects as "Withdrawal Syndrome" - is ADDICTIVE. I was on Effexor for 4 months, I was up to almost 300mg a day, a walking zombie, and decided to slow taper. I tapered off 37.5mg a week, and it took me 2 months, and I still had awful withdrawal: shocks, brain shivers- where it feels like your brain is physically vibrating side to side in your head, vertigo to the point that I could not drive, tinnitus, mood swings, anxiety...the list goes on
after 4 days of this hell, I started on Wellbutrin, and that helped alleviate some of the withdrawal, helped with my depression, and i quit smoking. personally, it is the best antidepressant I've found (for me, of course, to each his/her own...) with the least amount of nasty side effects. and its very effective at making cigarettes completely unappealing, if you're trying to quit, this is a nice bonus.