1 mo old baby with seizures

Hello. My one month old baby is in the hospital with seizures, he was having them with body movement at home, jerking head back, knees up, arching back. He was admitted into the hospital and put on phenybarbitol, which controlled body movements, but eeg's still show seizure activity in the brain. He is also on Dilantin, and most recently Tropomax, which hasn't had the chance to reach theraputic levels, so far, eeg's still show seizure activity. Plus he is sleeping all the time, probably from meds and seizures. The doctors have ruled out most things, waiting for metabolic tests to come back. Does anyone else have any similar stories? It is so frustrating for them not to be able to get seizures under control.