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Endocrinology
Estimate the starting levothyroxine dose for hypothyroidism: ~1.6 mcg/kg/day for full replacement, ~25–50 mcg/day for subclinical hypothyroidism. Recheck TSH at 6–8 weeks.
Formula
Dose = Weight × factor. Replacement: 1.6 mcg/kg. Suppression: 2.0 mcg/kg. Subclinical/elderly: 1.0 mcg/kg.
Inputs
Endocrinology
Interpret TSH and free T4 to assess thyroid function. Normal TSH: 0.4–4.0 mIU/L. Identifies overt and subclinical hypothyroidism, hyperthyroidism, and euthyroid sick syndrome.
Formula
Clinical interpretation based on TSH and free T4 reference ranges
Inputs