Primidone (Mysoline); Anticonvulsant; Tab: 50, 250 mg;
<8 yrs: 50-125 mg/day PO qhs, increase by 50-125 mg/day q3-7d; usual dose 10-25
mg/kg/day tid-qid
>8 yrs: 125-250 mg PO qhs; increase by 125-250 mg/day q3-7d, usual dose 750-1500 mg/day tid-qid (max 2 gm/day).
Therapeutic
serum levels: 5-12 mcg/mL. Unlike
phenobarbital,
primidone is not a scheduled drug. It is metabolized in the liver to
phenobarbital.