A 48-year-old woman complains of fatigue, constipation, cold intolerance, and weight gain despite no change in diet. Her TSH is 12.5 mIU/L (normal 0.4-4.0 mIU/L) and free T4 is 0.7 ng/dL (normal 0.8-1.8 ng/dL). What is the most appropriate treatment?

Question

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B) Levothyroxine. The patient's symptoms and lab values (elevated TSH, low free T4) are consistent with primary hypothyroidism. Levothyroxine, a synthetic T4 replacement, is the standard treatment to restore euthyroid state. Other options are for hyperthyroidism or other conditions.

A 48-year-old woman complains of fatigue, constipation, cold intolerance, and weight gain despite no change in diet. Her TSH is 12.5 mIU/L (normal 0.4-4.0 mIU/L) and free T4 is 0.7 ng/dL (normal 0.8-1.8 ng/dL). What is the most appropriate treatment?

✓ Correct Answer: Option B

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