Levothyroxine (Levothroid, Synthroid, Unithroid); Thyroid Hormone; Inj: 0.2, 0.5 mg/vial
Tab: 25, 50, 75, 88, 100, 112, 125, 137, 150, 175, 200, 300 mcg;
PO:
0-6 mos: 8-10 mcg/kg/day qd (or 25-50 mcg/day)
6-12 mos: 6-8 mcg/kg/day qd (or 50-75 mcg/day)
1-5 yrs: 5-6 mcg/kg/day qd (or 75-100 mcg/day)
6-12 yrs: 4-5 mcg/kg/day qd (or 100-150 mcg/day)
>12 yrs: 2-3 mcg/kg/day qd (or >150 mcg/day)
Adolescents/Adults: 12.5-50 mcg/day qd to start, titrate as needed (average 100-200 mcg/day)
IV/IM: Use 50% of oral dose.
Monitor
thyroid function tests and
clinical signs of hyperthyroidism and hypothyroidism.