Unless your daughter is having very frequent seizures, then I doubt that the seizures are causing her failure to develop. Did the CT scan of the brain show any abnormalities? I do not have all the information, but perhaps there was damage to the brain around the time of birth. If this the case, then there may be no medication to specifically treat this condition. The best treatment then is therapy and continued
supportSupport
Support 500 from the family, which I am sure you are giving. You may also wish to speak with your doctors to ask if they have evaluated your daughter for muscle disorders, or disorders of energy production(mitochondrial disorders). I wish I could help more. Good luck.