I have been on Effexor XR for almost 7 yrs.........wow, I can't believe it has been that long.......sorry..
Anyway, I currently take 600 mgs (for the past 2 yrs) and I too have heard the horror stories of withdrawel. But I have also heard that reducing it by a small dose (like psisc advised) every week is the way to go.
For me, I would love to increase the dose and will try again to get my pdoc to agree....I hate to add new meds.....
Well good luck and go slooooow!