Have no fear! I am one peson who was on 225 ml of effexor about 2 yrs ago and went off due to the sexual side effects, and I had no problems at all. I can't quite remember how quickly I went off, but I don't remember any troubles. I am on it again, right now at 75 mg, and will probably be going up a bit at my next dr appointment.
I hope it will go as easily for you as it did for me!