Epilepsy Adult 600 mg in 2 divided doses. May be increased by 200 mg every 3 days to 1-2 g daily (20-30 mg/kg daily) up to a max of 2.5 g/day.
Childn 20-30 mg/kg/daily, may be increased to 40 mg/kg daily in severe cases. Combination w/ anticonvulsants (phenytoin, phenobarb & carbamazepine): Initiation therapy should be gradual to raise by 5-10 mg/kg/day.
Bipolar Initially, 20 mg/kg/day. Max: 3,000 mg/day. Maintenance: 1,000-2,000 mg/day.