My son has been on deflazacort for only 1 month. I know that one of the side effects is behavioural change (hopefully which will leave as he is on it longer). However, I miss my son. My little guy is so angry and emotional and is having meltdowns ALL the time. As I said I know its a side effect but its really hard and nobody else understands. Have any of you experienced this? I am so sad and just want my little boy back, the one that laughed and cuddled and was full of joy and love. I hate this disease.