Therapy can be initiated w/ either PO (tab or syr) or IV (soln for infusion) administration. Conversion to or from PO & IV administration can be done directly w/o titration. Administer soln for infusion over a period of 15-60 min bd (at least 30 min is preferred for >200 mg per infusion).
Adult; adolescent & childn weighing ≥50 kg Monotherapy Starting dose: 50 mg bd (100 mg/day), increased to initial therapeutic dose of 100 mg bd (200 mg/day) after 1 wk. Can also be initiated at 100 mg bd (200 mg/day). Maintenance dose: Can be further increased at wkly intervals by 50 mg bd (100 mg/day). Max dose: 300 mg bd (600 mg/day).
Adjunctive therapy Starting dose: 50 mg bd (100 mg/day), increased to initial therapeutic dose of 100 mg bd (200 mg/day) after 1 wk. Maintenance dose: Can be further increased at wkly intervals by 50 mg bd (100 mg/day). Max dose: 200 mg bd (400 mg/day).
Monotherapy & adjunctive therapy Loading dose: May also initiate treatment w/ single loading dose of 200 mg, followed approx 12 hr later by 100 mg bd (200 mg/day) maintenance dose.
Childn ≥4 yr & adolescent weighing <50 kg Dose is determined based on body wt. Initiate treatment w/ syr & switch to tab, if desired.
Monotherapy Starting dose: 1 mg/kg bd (2 mg/kg/day) or 0.1 mL/kg bd, increased to initial therapeutic dose of 2 mg/kg bd (4 mg/kg/day) or 0.2 mL/kg bd after 1 wk. Maintenance dose: Can be further increased at wkly intervals by 1 mg/kg bd (2 mg/kg/day) or 0.1 mL/kg bd. Max dose in childn weighing ≥40 to <50 kg: 5 mg/kg bd (10 mg/kg/day) or 0.5 mL/kg bd. Max dose in childn weighing ≥10 to <40 kg: 6 mg/kg bd (12 mg/kg/day) or 0.6 mL/kg bd.
Adjunctive therapy Starting dose: 1 mg/kg bd (2 mg/kg/day) or 0.1 mL/kg bd, increased to initial therapeutic dose of 2 mg/kg bd (4 mg/kg/day) or 0.2 mL/kg bd after 1 wk. Maintenance dose: Can be further increased at wkly intervals by 1 mg/kg bd (2 mg/kg/day) or 0.1 mL/kg bd. Max dose in childn weighing ≥30 to <50 kg: 4 mg/kg bd (8 mg/kg/day) or 0.4 mL/kg bd. Max dose in childn weighing ≥20 to <30 kg: 5 mg/kg bd (10 mg/kg/day) or 0.5 mL/kg bd. Max dose in childn weighing ≥10 to <20 kg: 6 mg/kg bd (12 mg/kg/day) or 0.6 mL/kg bd.
Patient (paed weighing ≥50 kg & adult) w/ mild or moderate renal impairment Loading dose of 200 mg may be considered, but further dose titration (>200 mg daily) should be performed w/ caution.
Patient (paed weighing ≥50 kg & adult) w/ severe renal impairment or ESRD Max dose of 250 mg/day is recommended & dose titration should be performed w/ caution. If loading dose is indicated, initial dose of 100 mg followed by 50 mg bd for the 1st wk should be used.
Patient (paed weighing ≥50 kg & adult) w/ mild to moderate hepatic impairment Max dose of 300 mg/day is recommended. Loading dose of 200 mg may be considered, but further dose titration (>200 mg daily) should be performed w/ caution.