Hi Hemendra,
You can shift to Defrijet (orange flavour tablet) from Desirox. Both are the same medicine Deferasirox. This will solve ur problem of bitter taste. Otherwise , u can follow Sharmin and add some juice of orange to it.
Moreover, Do not ask for ferritin when ur baby is having fever, infection, cough or cold. Ferritin highly fulcuate while infections and fever.
Desirox takes times to reduce ferritin, sometimes it shows effect in ferritin after 6-24 months.
Compliance is a tough issue with Desferal or Kelfer. So stick to Desirox and keep patience.