HI Mz Pat,
I had epilepsy as a child and was on some pretty strong meds. I had frequent petit mals, which are basically small seizures (I believe it is a form of an absence seizure) and had 3 grand mals, which are the big seizures. My seizures were a result of flashing lights (strobes, flickering lights in the trees, etc). The medication did control the seizures, and I had no more after being on the meds. However, I will tell you that all of the medications that I was on made me a bit of a depressed child. Different meds made the depression worse or more manageable. Typically with these types of meds the doctors will start at the lowest dose until they see that the seizures are gone.
Your daughter will have appointments with her neurologist approximately every 3-6 months to check to see if the meds are still working, as well as to have liver panels to see if the meds are negatively effecting her liver functioning.
The only limitations I had was that I was not allowed to swim, take a bath alone, or ride a bike without someone being with me. Additionally, I always had to leave the door unlocked in the bathroom while I was showering.
I was diagnosed as having outgrown the epilepsy when I was 20, and was weaned off my medicine at that time. I have not had a seizure since. From what I understand it is hereditary, but since mine did not show up until I was 10 we think it may have been related to my MMR booster. I do have one distant blood relative that has it, but no others in the family do.
Also, the MRI and EEG's are really nothing to worry about. The MRI is quite noisy and a little confining, but they most likely will give your child a sedative which will help her to relax while they do it. If the sedative works, the test will last approximately 20-30 minutes, depending on how much of the brain they need to scan. The MRI allows them to see if any brain damage has been done, and if so, which section of it is having the problem. It also checks for blood clots, tumors, etc. and will determine if this is the cause of the seizures.
I will say good for all of your for figuring out what this was before she had a grand mal. Those are quite terrifying to watch, as well as to have. Hopefully the medicine for epilepsy has gotten better since I was a child (I am now 40).
If you have further questions, do not hesitate to write back. Epilepsy can be scary for all involved, but once it is under control, things will return to normal.