Hello @AA, I started Femara 2 weeks after finishing chemo before radiotherapy. My medical oncologist said it was up to me but my radiation oncologist said if it was her she would start asap. There used to be a theory that starting hormone therapy before radiation would "make the cells go to sleep" in her words & radiation would be unable to target them but they have disproved this now so if your doctors advise it there is no reason not to. Radiation went well & I don't think I had any extra side affects from doing the 2 together. Good luck!
