You were on a large dose, and it will take quite a
time to get it out of your system. If you have read other posts about
withdrawal from
Effexor, you will see that it is difficult. You could go back and see the doctor about this, or sit it out, and wait to feel better. Some people say it takes quite a time, but in my case, I was on 150mg daily, and did withdraw at once. I had never heard about all the withdrawal symptoms, and in my case I was feeling better after a couple of weeks.