The recommended dosage of Exjade is 30 mg/kg per day. For his weight, that comes to 1320 mg daily, but it doesn't have to be so exact. Because he only transfuses every two months, he won't accumulate iron at the same rate as most thal majors, so a lower dose of 20-25 mg/day may be enough, as long as his transfusion frequency doesn't increase. When the drug is first started, it is best to start with a low dose for two weeks, to minimize the initial side effects, especially the rash. 1/3 to 1/2 dose at first. In addition to liquids, Exjade tabs can be crushed and mixed with soft foods to make it easier to take.
Novartis does have a program in the US to help patients pay for the drug if insurance doesn't, but that is for US patients. I do not know if they have a program for Asian patients. The only information I can find for the Novartis office in Vietnam is
NOVARTIS PHARMA SERVICES AG - REPRESENTATIVE OFFICE IN HO CHI MINH
Company Information
72-74 Nguyen Thi Minh Khai Street,
Ho Chi Minh, Ho Chi Minh City, Vietnam
+84-838239090