A new anticonvulsant compound, zonisamide (1,2 benzisoxazole-methanesulfonamide), was studied in 10 adults with medically refractory partial seizures. Following a single oral dose of 400 mg, peak plasma levels occurred an average of 2.8 h after dosing, and the mean clearance from plasma was 2.34 L/h. Whole blood concentrations were higher than plasma concentrations because of red blood cell binding. Steady-state plasma concentrations were higher than predicted from a linear kinetic model. In most patients, seizure frequency was reduced after zonisamide was substituted for a standard antiepileptic drug. Dose-related reversible side effects in the central nervous and gastrointestinal systems were observed. Most patients tolerated doses between 5.2 and 12.5 mg/kg/day.
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| http://dx.doi.org/10.1111/j.1528-1157.1985.tb05407.x | DOI Listing |
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