The medication just suppresses the likelihood of a seizure occurring. Less commonly there are chemical problems contributing to the developmental difficulties. For some of these treatments can correct the underlying chemical problem. One well known example is poor thyroid function, which is easily treated with additional thyroid hormone. Other metabolic disorders, treatable and untreatable, can also occur.
Surgical problems are even more uncommon.
These include neurosurgery for hydrocephalus, tumors, severe epilepsy or other problems. Surgery may also assist complications such as contracted muscles in cerebral palsy. By contrast to 'treatment', the term 'management' suggests strategies which enable you to live with the problems in the best possible way. Instead of working with the child to change the child, management means working with the world around the child in order to make the child's experience of life as good as possible. In working with the world around the child, I find it useful to think of this in layers.