Strange I also took effexor for a while, it was the worst drug I ever taken. I got brain zaps as a kid long before I ever took any antidepressants but eventually they stopped. I never knew they were associated with stopping antidepressants, I have never seen anyone describe them before other than this thread.
When I was taking effexor I would forget to take them and also eventually I just built up a tolerance to them, and when I didn’t have the drug in my system I got this sort of lagging feeling. Like my whole body would feel like it was lagging behind me, moving my hands or head or whatever felt weird. I kept getting those symptoms even when taking effexor and I also developed worse symptoms like psychosis and an inability to sleep(like didn’t sleep for over a week) so I eventually just stopped taking effexor cold turkey. I felt that lagging feeling for months after but it eventually went away. I refuse any psych meds now because of my experiences with effexor.