I too was on Effexor for over a year and put on approx 100lbs before the dr took me off. I'm on Cymbalta right now and one of its side effects is weight loss, so I've taken off 65 of the 100 so far. I'm not sure of the withdrawal since I took an OD and came off it in one nite. But otherwise I can certainly relate.
Welcome,
You've come to the correct arena.
There are some of us who are currently forming an "Against-Effexor" posse. I will be happy to speak with you via PM/email regarding this medication and all its deleterious side-effects, as well as why psychiatrists all over the globe have, in a jokingly fashion, coined it Side-Effexor (not funny doctors!).
Please PM//email me and join our united mission to have this drug removed from the world trade market by the FDA.