My 14 yr daughter had a seizure when she was 18 mons old. she doesn't now when to stop eating she will eat until she is sick. she is over weight now.

See below: Please have your daughter seen by her primary care physician or a pediatrician she needs a workup.. There are reasons for her ongoing complaints.

Start with Pedi: I would start with your pediatrician. There are many causes of excessive eating and not being able to determine when full. There are a variety of tests that can be done to define cause.