Partial onset seizure Adult ≥16 yr Initially 500 mg bid, may be increased by 500 mg bid every 2 wk to 1,500 mg bid.
Ped patient 4 yr-<16 yr Initially 10 mg/kg bid, increased by 10 mg/kg bid every 2 wk to 30 mg/kg bid,
6 mth-<4 yr Initially 10 mg/kg bid, increased by 10 mg/kg bid every 2 wk to 25 mg/kg bid,
1 mth-<6 mth Initially 7 mg/kg bid, increased by 7 mg/kg bid every 2 wk to 21 mg/kg bid.
Myoclonic seizure Adult & ped patient ≥12 yr w/ juvenile myoclonic epilepsy Initially 500 mg bid, increased by 500 mg bid every 2 wk to 1,500 mg bid.
Primary generalized tonic-clonic seizure Adult ≥16 yr Initially 500 mg bid, increased by 500 mg bid every 2 wk to 1,500 mg bid.
Ped patient 6 yr-<16 yr Initially 10 mg/kg bid, increased by 10 mg/kg bid every 2 wk to 30 mg/kg bid.
Dose adjustment Adult w/ mild renal impairment (CrCl 50-80 mL/min/1.73 m2) 500-1,000 mg every 12 hr,
moderate (CrCl 30-50 mL/min/1.73 m2) 250-750 mg every 12 hr,
severe (CrCl <30 mL/min/1.73 m2) 250-500 mg every 12 hr,
ESRD patient using dialysis 500-1,000 mg every 24 hr. Supplemental dose of 250-500 mg is recommended following dialysis.