I've been completely off for a week now -- and while I wouldn't call my moods "flash rages" - I am very aware of my irritability...particularly in the afternoon to evening. Two suggestions: first - don't do this without some medical supervision. While tapering off Effexor isn't usually dangerous (except to those people who might turn into collateral damage when my moods swing)...it can be very unpleasant....a psychiatrist/psychopharmacologist can help you work through the bumps...sometimes it's just knowing what to expect. Second, it sounds like you may be taking immediate release (not XR) Effexor. It might be worth looking into an extended release formulation....it's a question for the doctor....but it might help a bit.