Interventions and Duration Hydroxyurea will be given to the participants in intervention arm along with the standard treatment if thalassemia (blood transfusion and iron chelation therapy) and the control arm will receive the standard treatment (blood transfusion and iron chelation therapy) only. Each participant will be followed up for 6 months after initiating the intervention. Intervention will be given for 6 months or until the participant withdraws from the study or due to any reason, the investigator stops the intervention.