I hope the more experienced folks on the board don't mind if I barge in here and attempt to field this question.
If you take steroids, when you are a KNOWN and MEDICATED epileptic, you are an idiot. Assuming you are simply young, naive and have a sense of complete invulnerability I shall elaborate: Epilepsy can fucking kill you, do you understand that? Count yourself lucky that your epilepsy is controlled to such a degree that it allows you to enjoy a normal life. Accept the fact that ANYTHING that fucks with your brain chemistry can potentially throw that brain chemistry out of balance, which could trigger a seizure.
In other words, since steroids most definitely affect neurotransmitters, taking them has the potential to trigger a seizure and make you die.
Any more questions?