Alia,
Andy's question is very important. To put things into some perspective, my daughter is taking 375mg daily (7 days a week) and she weighs 38lbs. It took her seven months to bring the S.F from 2400 to 1600.
Please note the proper dose for her weight is at least 500mg, but she is restricted by doctors because of her age. (please note currently exjade is not prescribed to children under six in Canada but my daughter cannot tolerate desferal and she got special permission to get exjade).