Hi, welcome to the forum.
If I were you, I'd consult with the Epilepsy Foundation for advice. There may be suggestions here as well, but most members are not medical professionals per se.
Even the medical professionals that are here could not answer questions without firsthand knowledge of your daughter's health, test results, etc.
Here is a link to the Epilepsy Foundation.www.epilepsy.com/
One point, I'm disappointed with the Foundation's Medical Marijuana petition on the page at the above link, it's part of various linkable stories available there. I'm a firm believer in proper pharmacy, if there's a legitimate use, extract the beneficial components, put them into a conventional form, and market the quality controlled product through pharmacies.
Please keep the forum posted of any progress you make elsewhere, it may be a lot of help to others in similar circumstances.