Adult Dosing
Partial-Onset or Primary Generalized Tonic-Clonic Seizures
Monotherapy
- Topamax, topiramate (generic)
- Start 25 mg PO bid x 1 wk, increase 50 mg/day qwk until 100 mg bid; then increase 100 mg/day qwk until 200 mg bid ; doses > 400 mg/day rarely more effective
- Qudexy XR, Trokendi XR
- Start 50 mg PO qd x 1wk, increase by 50 mg/day at weekly intervals for first 4 weeks, then 100 mg/day for weeks 5 to 6; target dose is 400 mg PO qd
Adjunctive therapy
- Topamax, topiramate (generic)
- Start 25-50 mg/day x 1 wk; increase 25-50 mg/day qwk until 100-200 mg PO bid; doses > 400 mg/day rarely more effective
- Qudexy XR, Trokendi XR
- Start 25-50 mg PO qd x 1wk, increase by 25-50 mg/day at weekly intervals to achieve effective dose; not to exceed 200-400 mg/day for partial onset seizures or 400 mg/day for generalized tonic-clonic seizures
Lennox-Gestaut seizures
Adjunctive therapy
- Topamax, topiramate (generic)
- Start 25-50 mg/day x 1 wk; increase 25-50 mg/day qwk until 100-200 mg PO bid, doses > 400 mg/day rarely more effective
- Qudexy XR, Trokendi XR
- ECAPS: Start 25-50 mg PO qd initially; increase by 25-50 mg/day at weekly intervals to achieve effective dose; not to exceed 200-400 mg/day for partial onset seizures or 400 mg/day for generalized tonic-clonic seizures
Migraine prophylaxis
- Start 25 mg PO qd x 1 wk, then increase 25 mg/day qwk until 100 mg/day (divided bid) is reached
- Max: 200 mg/day
Note::Swallow capsules whole or sprinkle on soft food. Taper gradually to discontinue
Pediatric Dosing
Partial-Onset or Primary Generalized Tonic-Clonic Seizures
Monotherapy
- Topamax, topiramate (generic)
- Start 25 mg PO bid x 1 wk, increase 50 mg/day qwk until 100 mg bid; then increase 100 mg/day qwk until 200 mg bid, doses > 400 mg/day rarely more effective
- 10 yrs (Extended release capsule)
- Start 50 mg PO qd x 1wk ; increase by 50 mg/wk for first 4 weeks, then 100 mg/wk for weeks 5 to 6; target dose is 400 mg PO qd
Adjunctive therapy
- 2-16 yrs Topamax, topiramate (generic)
- Start 1-3 mg/kg/day PO qhs x 1 wk; increase 1-3 mg/kg/day q1-2 wks until 5-9 mg/kg/day PO divided bid
- Trokendi XR
- Start 25 mg PO qhs for first week (based on 1-3 mg/kg/day); increase dose by 1-3 mg/kg once daily at 1-2 week intervals to 5-9 mg/kg PO qd
- Qudexy XR
- Start 25 mg PO qhs for first week (based on 1-3 mg/kg/day); increase dose by 1-3 mg/kg once daily at 1-2 week intervals to 5-9 mg/kg PO qd
Lennox-Gestaut seizures
Adjunctive therapy
- Topamax, topiramate (generic)
- Start 1-3 mg/kg/day PO qhs x 1 wk; increase 1-3 mg/kg/day q1-2 wks until 5-9 mg/kg/day PO divided bid
- Trokendi XR
- Start 25 mg PO qhs for first week (based on 1-3 mg/kg/day); increase dose by 1-3 mg/kg once daily at 1-2 week intervals to 5-9 mg/kg PO qd
- Qudexy XR
- Start 25 mg PO qhs for first week (based on 1-3 mg/kg/day); increase dose by 1-3 mg/kg once daily at 1-2 week intervals to 5-9 mg/kg PO qd
Note: Swallow capsules whole or sprinkle on soft food. Taper gradually to discontinue
Migraine prophylaxis
- Start 25 mg PO qd x 1 wk, then increase 25 mg/day qwk until 100 mg/day (divided bid) is reached
- Max: 200 mg/day
Note:
- Safety and efficacy <12 years not established
[Outline]
Renal Dose Adjustment (Based on CrCl)
- Renal impairment
- < 70 mL/min: Decrease dose by 50%
- Hemodialysis: Supplemental dosing may be required
Hepatic Dose Adjustment
- Hepatic impairment: Use with caution; dose adjustments not defined
See Supplemental Patient Information
- AEDs, including topiramate, increase the risk of suicidal thoughts or behavior; monitor for the emergence or worsening of depression, suicidal thoughts or behavior, and/or any unusual changes in mood or behavior
- Acute myopia associated with secondary angle closure glaucoma has occurred; discontinue if decreased visual acuity and/or ocular pain anterior chamber shallowing, ocular hyperemia and increased ICP occurs
- Visual field defects have also been reported in patients with elevated intraocular pressure, hence discontinue the therapy
- Hyperchloremic, non-anion gap, metabolic acidosis may occur; maintain adequate hydration and caloric intake; avoid ketogenic diets
- Oligohidrosis and hyperthermia have ocuured, most cases have occurred in children
- Gradually withdraw therapy to minimize potential of increased seizure frequency
- Monitor closely for oligohidrosis and hyperthermia (especially pediatric patients)
- Monitor for signs and symptoms of depression, behavior changes and suicidality
- Measure CrCl and bicarbonate at baseline, then periodically
- Avoid use of alcohol 6 hours before and after therapy administration (ECAPS)
- Risk of cognitive/neuropsychiatric disorder
Cautions: Use cautiously in
- Renal impairment
- Hepatic impairment
- Hx of nephrolithiais
- Dehydration
- Respiratory disease
- Congenital metabolic disorders
- Co-administration of valproic acid
- Hx of depression
- Status epilepticus
- Ketogenic diet
- Pediatric population
- Geriatric population
Supplemental Patient Information
- Advise caretaker regarding monitoring for signs and symptoms of depression, behavior changes and suicidality
Pregnancy Category:C
Breastfeeding: Limited data indicates that maternal doses 200 mg/day produce relatively low levels in infant serum. Monitor breastfed infant for drowsiness, adequate weight gain, and developmental milestones, (especially in exclusively breastfed infants or if mother taking combinations of anticonvulsant/psychotropic drugs). This information is based upon LactMed database (available at http://toxnet.nlm.nih.gov/cgi-bin/sis/htmlgen?LACT last accessed 9 August 2010).
Pricing data from www.DrugStore.com in U.S.A.
- Topiramate 50 MG TABS [Bottle] (GLENMARK PHARMACEUTICALS)
60 mg = $39.99
180 mg = $99.97 - Topiramate 200 MG TABS [Bottle] (GLENMARK PHARMACEUTICALS)
60 mg = $50.99
180 mg = $130.97 - Topiramate 100 MG TABS [Bottle] (GLENMARK PHARMACEUTICALS)
60 mg = $49.99
180 mg = $129.98 - Topamax 50 MG TABS [Bottle] (JANSSEN)
60 mg = $400.01
180 mg = $1119.96 - Topiramate 25 MG TABS [Bottle] (GLENMARK PHARMACEUTICALS)
60 mg = $29.99
180 mg = $79.97 - Topamax 25 MG TABS [Bottle] (JANSSEN)
60 mg = $201.99
180 mg = $574.97 - Topamax 200 MG TABS [Bottle] (JANSSEN)
60 mg = $626
180 mg = $1790.9 - Topiramate 15 MG CPSP [Bottle] (TEVA PHARMACEUTICALS USA)
60 mg = $70.99
180 mg = $199.96 - Topiramate 25 MG CPSP [Bottle] (TEVA PHARMACEUTICALS USA)
60 mg = $85.99
180 mg = $235.96 - Topamax 100 MG TABS [Bottle] (JANSSEN)
60 mg = $556.01
180 mg = $1650.05
Warning: This pricing information is subject to change at the sole discretion of DS Pharmacy. For the most current and up-to-date pricing information, please visit drugstore.com.