Tell them the truth. Or get an uber or a limo service for the night. She will think its a romantic gesture and you can tell her on your time.

Just tell her that you have Epilepsy and can not drive.Tell her what kind of seizure u have. and see if she can drive. So she knows that if something sure happen she will be there to help.

Tell them straight out and if they give a shit it shouldn,t bother them

Get to know the girl and if you two are not comfortable around each other it wont last.
But if you know you 2 want to see each other explain to her your health problem girls will be more understanding .
Now a days there is better public transportation then ever.

I would alway warn the person right away. After I have warned them , I would watch their body language. If never hear back from the person , that to would give me the clue, that they don't want to try to know a person with Epilepsy.