What are the symptoms of your withdrawal? Weaning off of Effexor should be a very slow process. If you wean to fast the withdrawals can be quite severe. If it has been five days it should pass within a few days. If not, talk to your doctor. My doctor weaned me off to fast and my withdrawals were really bad and I had to stay home two days from work. But it only lasted about 5 days. Your doctor should have a plan for this. Good luck.