Moderate

Hypothyroidism should be treated with daily administration of which of the following thyroid hormone preparations ?

Correct answer: C. Thyroxine (T4)

  • A. Thyroid extract
  • B. Thyroglobulin
  • C. Thyroxine (T4)
  • D. Triiodothyronine (T3)

Explanation

Daily levothyroxine, synthetic T4, is preferred because it has a longer half-life and is converted in tissues to the active hormone T3. T3 has a shorter action and produces more rapid peaks, making routine replacement less stable.

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