Wow, you described the exact thing that happened to me when I was on both of those drugs. Effexor is extremely difficult to get off of. I've never quite been able to explain what happens when you don't take your meds at the same time every day. I always just called it feeling 'off'. Brain zaps sound much more accurate! My experience with Lexapro and Effexor was not good. They never really 'worked' and I did give them each a sufficient amount of time to kick in. The w/d was very difficult. Just my 2 cents!