<p><strong>Adults (17 years and older)</strong>: Initial dosage for monotherapy is 100 mg twice daily; initial dosage for adjunctive therapy is 50 mg twice daily; maximum recommended dosage for monotherapy and adjunctive therapy is 200 mg twice daily&nbsp;<br />
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<strong>Pediatric Patients 4 Years to less than 17 years</strong>: The recommended dosage is based on body weight and is administered orally twice daily. Increase dosage based on clinical response and tolerability, no more frequently than once per week<br />
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<strong>Injection</strong>: for intravenous and adult use only when oral administration is temporarily not feasible; dosing regimen is the same as oral regimen; administer over 15 to 60 minutes; obtaining ECG before initiation is recommended in certain patients</p>