Abstract
A male young California sea lion(Zalophus californianus)suffered from epileptiform seizures many times from 1990. Because the symptoms of those seizures had been similar to epileptic seizures, the administration of oral medication of phenobarbital at about 2.0mg/kg had begun, and the frequency of the seizures reduced drastically. The seisures are almost controlled by this medication at the same dosage at the present 1997. Blood samples were taken to check the serum concentration and side effects of phenobarbital. There is a moderate increace in Gamma Glutamyl Transpeptidase(GGT).
