I was taking 75mg of venlaflexine antidepressants for a while. I went back to doctors because I feel they wasn't working and he doubled my dosage which I wasn't to happy with. I have now been on 150mg for 9 week so but but I am constantly dizzy, feel sick and light headed. They effect my sleeping And eating which I am aware is common side effects but I don't like how they make me feel. Can I just go back to taking 75mg on my own?