Series on pharmacology in practice. 5. Thyroid hormones.

Thyroid hromones are among the most commonly prescribed medications. This article attempts a critical comparison of available preparations in the light of more recent information regarding thyroid physiology and, in particular, peripheral thyroid hormone economy. Indications and complications of therapy are reviewed. Present knowledge of thyroid physiology indicates that the use of L-thyroxine has advantages over other preparations in the treatment of hypothyroidism.