I was on 300 mg of Effexor for five years and then I switched doctors and he wanted me to get down to 150 mg of Effexor per day which was done by cutting the dose by 37.5 mg per day for one-two weeks then cutting it again by 37.5 mg for another one-two weeks until I got down to 150 mg. Effexor is very difficult to wean. That is why you have been told to break it down very slowly over time. If you chop it in half, significant rebound side effects can occur and you may end up in distress. Talk this over with your psychiatrist. Good Luck.