Is there anyone else who has vascular dementia and has seizures due to that diagnosis?

My husband who is 77 has been disabled for a long time due to having a heart attack, sleep apnea, type 2 diabetes, pulmery heart disease, C.O.P.D., pernicious anemia and arthritis every ware so he needs a wheelchair outside and uses a simmer inside, but since 2010 he was diagnosed with vascular dementia. Now due to that he has seizures which makes his body shake, jump and kick during this he doesn't know what's happening but when he comes out of it he is very tired and drained of energy. He was put on Lamotrigine when this first started and now takes 200mgs twice a day, the doctor said there is nothing else he can do about it. I just wonder if there is anyone else that has the same proplem and is it all down to having dementia?