I Need An Answer About Depakene

Hi, I took Depakene probably 8-10 years ago, but I don't remember how the doctor increased and decreased it, so I need to hear from someone who's taking it now. My husband's grandfather is having a whole host of medical problems right now. It started with a urinary tract infection that went unchecked for years. The doctors in the podunk town he lives in didn't give him the time and care he needed when he finally did go to get checked, so he was misdiagnosed for several months. The misdiagnosis and wrong treatment created more problems, landed him in the hospital, and he ended up needing surgery. He had complications from the surgery and only got worse. While in the hospital, he developed a heart arythmia and had a couple of seizures. Not sure what kind they were, but I know they weren't grand mals or myoclonic seizures. Anyhow, he's been out of the hospital for a while now but is on heart medication, oxygen, and Depakene. He needs the oxygen because one of the side effects of the heart med is fluid around the heart and in the lungs, so he's having trouble getting the oxygen he needs. He always feels like he suffocating. My husband's uncle and his wife are the ones caring for him, as they are the only ones who live in the same state. We found out last night that his aunt and uncle decided the doctors had Grandpa on too much Depakene, so they cut his dosage in half on their own. The did it in one day. Unfortunately, he started to have seizures, and who knows if they saw the connection. I don't know how much he was taking, but I know how dangerous it is to cut seizure meds in half overnight. With my Lamictal, I have to increase/decrease by 25mg a week. I don't remember what it was with the Depakene. Can anyone tell me what it is for you? My in-laws drove up to see Grandpa yesterday, so I plan to give them a call, so they can let them know just how dangerous what they're doing to him is.