Karima,
Exjade does not need to be taken on an empty stomach. I know many patients taking it after dinner, as it is the only way it doesn't upset their stomachs, and it works fine for them.
The problems older people have had with Exjade are found in elderly people, usually over age 70, who do not have thal, but have another unrelated condition.
I would suggest trying Exjade again, but in a low dose and mixed with food, instead of taking it on the empty stomach. Continue the desferal, as well. Also, watch for the new form of Exjade in pill form, called Jadenu. It is approved in the US and should soon see approval elsewhere. It greatly cuts down on nausea because the fillers in Exjade are not present in Jadenu.