. >> reporter: including 10-year-old braden fleming, who has epilepsy. handsome young man. >> thank you. >> reporter: his family came from houston to colorado springs, just to be on the waiting list to get a medicine called charlotte's web. >> several people's response was, who does that? who picks up their life and just moves? but those are people that don't have a child with epilepsy. >> reporter: braden suffers from doza syndrome marked by small and uncontrollable seizures. he had one in the middle of our conversation. >> or i watch baseball. >> reporter: was that one right there? >> yes. >> reporter: charlotte's web is a strain of marijuana low in thc. the psychoactive ingredient but high in cbd, a mystery compound believed to have healing properties. >> cbd is something that has captured the national imagination, political imagination, the fear of the medical community. >> reporter: dr. edward ma is a denver neurologist, studying charlotte's web. he warns it doesn't reduce seizures for everyone. >> 20% to 30% are having a pretty dramatic reduction a