My daughter is 6 years old, on concerta for ADHD and is losing weight. She has been on medications for adhd for over a year now. She was born at 35 weeks by c-section, hospitalized several times before age 2 for respiratory conditions. She has a congenital dislocation of her elbows, significantly more pronounced on left side, for which she is being monitored by Shriners hospital. No other significant medical history. She does not eat well, to the point where she gets physically sick (vomiting yellow liquid after periods of not eating). I have tried everything I can to get her to eat, even trying pediasure, ensure, even slim-fast shakes. She won't drink any of them. She is now starting to lose weight. She hasn't gained any weight in over 6 months, and now she is losing it. She now weighs 33 lbs. Help.