Steroids cause: (A) Increase TSH, (B) Increased FSH, (C) Prevent de-iodination, (D) All of the above
Answer is C. Refer Katzung 11/e p 670 Glucocoicoids on long term use suppress the realese of ACTH, GH, TSH, LH These also inhibit the activity of 5-deiodinase and thus inhibit the peripheral conversion of T4 to T3. These also decrease thyroid binding globulin