Seizure disorders. Adults, initial: 0.5 mg t.i.d. Increase by 0.5-1 mg/day q 3 days until seizures are under control or side effects become excessive; maximum: 20 mg/day. Pediatric up to 10 years or 30 kg: 0.01-0.03 mg/kg/day in two to three divided doses up to a maximum of 0.05 mg/kg/day. Increase by increments of 0.25-0.5 mg q 3 days until seizures are under control or maintenance of 0.1-0.2 mg/kg is attained.
Parkinsonian dysarthria. Adults: 0.25-0.5 mg/day.
Acute manic episodes of bipolar affective disorder.
Periodic leg movements during sleep.
Adults: 0.5-2 mg nightly.
Adjunct to treat schizophrenia. Adults: 0.5-2 mg/day.
Neuralgias. Adults: 2-4 mg/day.
Multifocal tic disorders. Adults: 1.5-12 mg/day.
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