I agree with both Jen and 2P. The four DMDs are not associated with causing or allowing seizures.
Q
I have heard that the new drug approved for use to help improve walking in MS patients can prompt seizures. I haven't seen any cautions about lowering seizure thresholds with Copaxone (the DMD I take).
Mary
DMDs are drugs that 'modulate the immune response.' Some make your immune system less reactive. Some distract the immune system from attacking the myelin. So a seizure disorder wouldn't interfere with these drugs, as far as I know.