Can a person with medicated epilepsy go to a laser show?

Could a person who has very well-regulated, well-medicated epilepsy attend a concert with a laser light?
My best friend has epilepsy. Her epilepsy is very well controlled and she has been on medication for years. We wanted to attend a concert that has a laser light show. I have heard that if the epilepsy is medicated, then she could go. I was wondering if anyone knows if this is true.