Cedars Sinai explains that this includes, but is not limited to, frontal lobe epilepsy, juvenile myoclonic epilepsy, or ...

which is followed by a tonic phase (muscle stiffness) and a clonic phase (rhythmic contractions) of the muscles. When most people think about seizures, they usually think of this kind.

Tonic-clonic: ≥16yrs: initially 500mg twice daily; increase at 2-week intervals by 1g/day to target dose of 3g/day. Renal impairment: CrCl 50–80mL/min: 500mg–1g every 12hrs; CrCl 30–50mL ...