2 DOSAGE AND ADMINISTRATION Topiramate tablets initial dose, titration, and recommended maintenance dose varies by indication and age group. See Full Prescribing Information for recommended dosage, and dosing considerations in patients with renal impairment, geriatric patients, and patients undergoing hemodialysis ( 2.1 , 2.2 , 2.3 , 2.4 , 2.5 , 2.6 ) 2.1 Dosing in Monotherapy Epilepsy Adults and Pediatric Patients 10 Years and Older The recommended dose for topiramate monotherapy in adults and pediatric patients 10 years of age and older is 400 mg/day in two divided doses. The dose should be achieved by titration according to the following schedule (Table 1): Table 1: Monotherapy Titration Schedule for Adults and Pediatric Patients 10 years and older Morning Dose Evening Dose Week 1 25 mg 25 mg Week 2 50 mg 50 mg Week 3 75 mg 75 mg Week 4 100 mg 100 mg Week 5 150 mg 150 mg Week 6 200 mg 200 mg Children Ages 2 to 9 Years Dosing in patients 2 to 9 years of age is based on weight. During the titration period, the initial dose of topiramate should be 25 mg/day administered nightly for the first week. Based upon tolerability, the dosage can be increased to 50 mg/day (25 mg twice daily) in the second week. Dosage can be increased by 25–50 mg/day each subsequent week as tolerated. Titration to the minimum maintenance dose should be attempted over 5–7 weeks of the total titration period. Based upon tolerability and seizure control, additional titration to a higher dose (up to the maximum maintenance dose) can be attempted at 25–50 mg/day weekly increments. The total daily dose should not exceed the maximum maintenance dose for each range of body weight (Table 2). Table 2: Monotherapy Target Total Daily Maintenance Dosing for Patients 2 to 9 Years of Age *Administered in two equally divided doses Weight(kg) Total Daily Dose(mg/day)* Minimum Maintenance Dose Total Daily Dose(mg/day)* Maximum Maintenance Dose Upto 11 150 250 12–22 200 300 23–31 200 350 32–38 250 350 Greater than38 250 400 2.2 Dosing in Adjunctive Therapy Epilepsy Adults (17 Years of Age and Over) The recommended total daily dose of topiramate tablets as adjunctive therapy in adults with partial onset seizures or Lennox-Gastaut Syndrome is 200 to 400 mg/day in two divided doses, and 400 mg/day in two divided doses as adjunctive treatment in adults with primary generalized tonic-clonic seizures. Topiramate tablets should be initiated at 25 to 50 mg/day followed by titration to an effective dose in increments of 25 to 50 mg/day every week. Titrating in increments of 25 mg/day every week may delay the time to reach an effective dose. Doses above 400 mg/day have not been shown to improve responses in dose-response studies in adults with partial onset seizures. Pediatric Patients Ages 2 – 16 Years The recommended total daily dose of topiramate tablets as adjunctive therapy for pediatric patients 2 to 16 years of age with partial onset seizures, primary generalized tonic-clonic seizures, or seizures associated with Lennox-Gastaut syndrome is approximately 5 to 9 mg/kg/day in two divided doses. Titration should begin at 25 mg/day (or less, based on a range of 1 to 3 mg/kg/day) nightly for the first week. The dosage should then be increased at 1- or 2-week intervals by increments of 1 to 3 mg/kg/day (administered in two divided doses), to achieve optimal clinical response. Dose titration should be guided by clinical outcome. 2.3 Dosing in Migraine Prophylaxis The recommended total daily dose of topiramate tablets as treatment for patients 12 years of age and older for prophylaxis of migraine headache is 100 mg/day administered in two divided doses (Table 3). The recommended titration rate for topiramate tablets for migraine prophylaxis is as follows: Table 3: Migraine Prophylaxis Titration Schedule for Patients 12 Years of Age and Older Morning Dose Evening Dose Week 1 None 25 mg Week 2 25 mg 25 mg Week 3 25 mg 50 mg Week 4 50 mg 50 mg 2.4 Administration Information Topiramate tablets can be taken without regard to meals. Topiramate tablets Because of the bitter taste, tablets should not be broken 2.5 Dosing in Patients with Renal Impairment In renally impaired subjects (creatinine clearance less than 70 mL/min/1.73 m 2 ), one-half of the usual adult dose is recommended. [see Use in Specific Populations ( 8.5 , 8.6 ), Clinical Pharmacology ( 12.3 )] . 2.6 Dosing in Patients Undergoing Hemodialysis To avoid rapid drops in topiramate plasma concentration during hemodialysis, a supplemental dose of topiramate may be required. The actual adjustment should take into account 1) the duration of dialysis period, 2) the clearance rate of the dialysis system being used, and 3) the effective renal clearance of topiramate in the patient being dialyzed [see Use in Specific Populations ( 8.7 ), Clinical Pharmacology ( 12.3 )] .