Oxcarbazepinedosage

Adults: Initiate with a dose of 600 mg/day, given twice a day

Adjunctive Therapy: Maximum increment of 600 mg/day at approximately weekly intervals. The recommended daily dose is 1,200 mg/day

Conversion to Monotherapy: Withdrawal concomitant over 3 to 6 weeks; reach maximum dose of oxcarbazepine oral suspension in 2 to 4 weeks with increments of 600 mg/day at weekly intervals to a recommended daily dose of 2,400 mg/day

Initiation of Monotherapy: Increments of 300 mg/day every third day to a dose of 1,200 mg/day

Initiate at one-half the usual starting dose and increase slowly in patients with a creatinine clearance < 30 mL/min Pediatrics: Initiation with 8 to 10 mg/kg/day, given twice a day. For patients aged 2 to < 4 years and under 20 kg, a starting dose of 16 to 20 mg/kg/day may be considered. Recommended daily dose is dependent upon patient weight.

Adjunctive Patients (Aged 2 to 16 Years): For patients aged 4 to 16 years, target maintenance dose should be achieved over 2 weeks. For patients aged 2 to < 4 years, maximum maintenance dose should be achieved over 2 to 4 weeks and should not exceed 60mg/kg/day

Conversion to Monotherapy for Patients (Aged 4 to 16 Years): Maximum increment of 10 mg/kg/day at weekly intervals, concomitant antiepileptic drugs (AEDs) can be completely withdrawn over 3 to 6 weeks

Initiation of Monotherapy for Patients (Aged 4 to 16 Years): Increments of 5 mg/kg/day every third day

2.1 Adjunctive

Therapy for Adults Initiate oxcarbazepine oral suspension with a dose of 600 mg/day, given twice a day. If clinically indicated, the dose may be increased by a maximum of 600 mg/day at approximately weekly intervals; the maximum recommended daily dose is 1,200 mg/day. Daily doses above 1,200 mg/day show somewhat greater effectiveness in controlled trials, but most patients were not able to tolerate the 2,400 mg/day dose, primarily because of central nervous (CNS) effects. Dosage adjustment is recommended with concomitant use of strong CYP3A4 enzyme inducers or UDP-glucuronosyltransferases (UGT) inducers, which include certain antiepileptic drugs (AEDs).

2.2 Conversion to

Monotherapy for Adults Patients receiving concomitant AEDs may be converted to monotherapy by initiating treatment with oxcarbazepine oral suspension at 600 mg/day (given in a twice a day regimen) while simultaneously initiating the reduction of the dose of the concomitant AEDs. The concomitant AEDs should be completely withdrawn over 3 to 6 weeks, while the maximum dose of oxcarbazepine oral suspension should be reached in about 2 to 4 weeks. Oxcarbazepine oral suspension may be increased as clinically indicated by a maximum increment of 600 mg/day at approximately weekly intervals to achieve the maximum recommended daily dose of 2,400 mg/day. A daily dose of 1,200 mg/day has been shown in one study to be effective in patients in whom monotherapy has been initiated with oxcarbazepine oral suspension. Patients should be observed closely during this transition phase.

2.3 Initiation of

Monotherapy for Adults Patients not currently being treated with AEDs may have monotherapy initiated with oxcarbazepine oral suspension. In these patients, initiate oxcarbazepine oral suspension at a dose of 600 mg/day (given twice a day); the dose should be increased by 300 mg/day every third day to a dose of 1,200 mg/day. Controlled trials in these patients examined the effectiveness of a 1,200 mg/day dose; a dose of 2,400 mg/day has been shown to be effective in patients converted from other AEDs to oxcarbazepine oral suspension monotherapy (see above).

2.4 Adjunctive

Therapy for Pediatric Patients (Aged 2 to 16 Years) In pediatric patients aged 4 to 16 years, initiate oxcarbazepine oral suspension at a daily dose of 8 to 10 mg/kg generally not to exceed 600 mg/day, given twice a day. The target maintenance dose of oxcarbazepine oral suspension should be achieved over 2 weeks, and is dependent upon patient weight, according to the following chart:

20 to 29 kg - 900 mg/day

29.1 to 39 kg – 1,200 mg/day

39 kg – 1,800 mg/day In the clinical trial, in which the intention was to reach these target doses, the median daily dose was 31 mg/kg with a range of 6 to 51 mg/kg. In pediatric patients aged 2 to < 4 years, initiate oxcarbazepine oral suspension at a daily dose of 8 to 10 mg/kg generally not to exceed 600 mg/day, given twice a day. For patients less than 20 kg, a starting dose of 16 to 20 mg/kg may be considered. The maximum maintenance dose of oxcarbazepine oral suspension should be achieved over 2 to 4 weeks and should not exceed 60 mg/kg/day in a twice a day regimen. In the clinical trial in pediatric patients (2 to 4 years of age), in which the intention was to reach the target dose of 60 mg/kg/day, 50% of patients reached a final dose of at least 55 mg/kg/day. Under adjunctive therapy (with and without enzyme-inducing AEDs), when normalized by body weight, apparent clearance (L/hr/kg) decreased when age increased such that children 2 to < 4 years of age may require up to twice the oxcarbazepine dose per body weight compared to adults; and children 4 to ≤ 12 years of age may require a 50% higher oxcarbazepine dose per body weight compared to adults. Dosage adjustment is recommended with concomitant use of strong CYP3A4 enzyme inducers or UGT inducers, which include certain AEDs.

2.5 Conversion to

Monotherapy for Pediatric Patients (Aged 4 to 16 Years) Patients receiving concomitant AEDs may be converted to monotherapy by initiating treatment with oxcarbazepine oral suspension at approximately 8 to 10 mg/kg/day given twice a day, while simultaneously initiating the reduction of the dose of the concomitant AEDs. The concomitant AEDs can be completely withdrawn over 3 to 6 weeks, while oxcarbazepine oral suspension may be increased as clinically indicated by a maximum increment of 10 mg/kg/day at approximately weekly intervals to achieve the recommended daily dose. Patients should be observed closely during this transition phase. The recommended total daily dose of oxcarbazepine oral suspension is shown in Table 1.

2.6 Initiation of

Monotherapy for Pediatric Patients (Aged 4 to 16 Years) Patients not currently being treated with AEDs may have monotherapy initiated with oxcarbazepine oral suspension. In these patients, initiate oxcarbazepine oral suspension at a dose of 8 to 10 mg/kg/day given twice a day. The dose should be increased by 5 mg/kg/day every third day to the recommended daily dose shown in the table below.

Table 1: Range of Maintenance Doses of Oxcarbazepine Oral Suspension for Pediatrics by Weight During Monotherapy From To Weight in kg Dose (mg/day) Dose (mg/day) 20 600 900 25 900 1,200 30 900 1,200 35 900 1,500 40 900 1,500 45 1,200 1,500 50 1,200 1,800 55 1,200 1,800 60 1,200 2,100 65 1,200 2,100 70 1,500 2,100

2.7 Dosage Modification for

Patients With Renal Impairment In patients with impaired renal function (creatinine clearance < 30 mL/min), initiate oxcarbazepine oral suspension at one-half the usual starting dose (300 mg/day, given twice a day), and increase slowly to achieve the desired clinical response.

2.8 Administration

Information Oxcarbazepine oral suspension can be taken with or without food. Before using oxcarbazepine oral suspension, shake the bottle well and prepare the dose immediately afterwards. The prescribed amount of oral suspension should be withdrawn from the bottle using the oral dosing syringe supplied. A household teaspoon or tablespoon is not an adequate measuring device and should not be used. Oxcarbazepine oral suspension can be mixed in a small glass of water just prior to administration, or alternatively, may be swallowed directly from the syringe. After each use, close the bottle and rinse the syringe with warm water, and allow it to dry thoroughly. Oxcarbazepine oral suspension and oxcarbazepine film-coated tablets may be substituted at equal doses.