After taking Effexor for only 6 weeks I decided to come off of it because I could not stand the side effects. I was only taking 75 mg and tapered down to zero over the course of 3 weeks. I have now been completely off of Effexor for 6 weeks and most of the severe withdrawal symptoms (brain zaps, dizziness, nausea, etc) have dissipated. However, I am now beginning to experience a lot of cognitive problems with short term memory and focus. I'm also having a lot of trouble communicating with people; often times I just cannot figure out what to say to people as if I can't translate my thoughts into words. Physically, it feels like I have a 10 lb weight hanging from my face and it doesn't seem to be going away. I do believe that this will go away over time but it's strange that I'm still having a lot of withdrawal issues when I was on the drug for such a small amount of time and at such a small dose. Should I be worried?