My non-identical twin daughters are both due on their periods next holiday time, which will involve lots of water-centred activities in the Greek islands. One uses tampons, no probs, other says urgh, no way. Both started early (same day, would you believe.) periods since age ten & half; both want to skip the holiday period - last time it happened, pretty much ruined their holiday. I would like to know, how easy is it to get something prescribed from the doctor, have heard good things about Norethisterone, does anyone have experience of this?