Adult & childn >10 yr Rapid oral loading: 750-1,500 mcg as single dose. When there is less urgency or greater risk of toxicity (eg, elderly), loading dose should be given in divided doses 6 hr apart w/ approx ½ the total dose given as 1st dose. Slow oral loading: 250-750 mcg daily for 1 wk followed by appropriate maintenance dose. Maintenance dose: Individualized dosage.
Childn ≤10 yr, infant & neonates Individualized dosage. Administer loading dose in divided doses w/ approx ½ the total dose given as the 1st dose & further fractions of total dose given at 4-8 hr intervals, assess clinical response before giving each additional dose.
Childn 5-10 yr Loading dose: 25 mcg/kg/24 hr,
2-5 yr Loading dose: 35 mcg/kg/24 hr,
term neonate to 2 yr Loading dose: 45 mcg/kg/24 hr.
Pre-term neonate weighing 1.5-2.5 kg Loading dose: 30 mcg/kg/24 hr,
<1.5 kg Loading dose: 25 mcg/kg/24 hr.