Winnie,
Since you are still new to chelation, I think you should try reducing your Exjade dose to just one tablet, crushed and mixed with soft food either with your dinner or while your stomach is still full after dinner. Try this for a couple weeks and if there is still no improvement, talk to your doctor about the other oral chelator, Ferriprox before deciding on desferal. Also, never take Exjade with high fat foods. It is no longer required that it be taken on an empty stomach but the one precaution is avoid mixing it with fatty foods. If things do improve, then try one tablet early in the day with food and one late in the day, and eventually work yourself up to the required dose. I would also advise drinking tea with meals as it inhibits iron absorption from foods.