What kind of seizure was it? I'm assuming Grand Mal, but there are different types to be aware of. Was she awake or sleeping at the time?

My advice is to not rush into a diagnosis. Also, with how young she is be weary of prescription drugs. Side effects are often overlooked by doctors in this area. I've had 5 or so neurologists and more drugs prescribed to me than I can count on two hands. Often the tests such as EEGs and MRIs may not catch any type of helpful brain activity. I've heard this from other folks as well.