6 weeks or until you are ready to be done cutting. What everyoen would want tothink of when cutting is cardio really does more for eating muscle, while burning some fat. Obvioulsy this is exactly what we dont want. So the more cardio you will do, and /or the more cals you drop the higher dose youll need to keep the muscle on since this isnt a very androgenic compound. I would say for dieting youll end up needing to be between 14-20mgs per day depending on how sever of a cut your are going for.
Its not a very toxic compound, so using it for 6-8weeks shouldnt be a problem.