Triiodothyronine (T3) as compared to T4 :: (A) Is more plasma protein bound, (B) Is shorter acting, (C) Is less potent, (D) Has delayed action
Answer is B. T3 is the main active thyroid hormone. It is more potent (less plasma protein bound) and faster acting than T4. How­ever, short duration of action limits its use for the treatment of hypothyroidism (requires lifelong treatment).
T3 is indicated for the treatment of myxedema coma.