I don't know the answer to that. I've been told yes and told that it was there, but dormant. 2 different opinions. I can tell you, I started out w/nocturnal grand mals, about 1 every year to a year and a half. After about 7 years, I started taking all kind, focal, tonic, partial, grand mals, jacksonian, sleepwalking seizures, and everything in between. Day or night, it didn't matter. Just letting you know it's happened to me and others.