Journal of Endocrinology and Metabolism, ISSN 1923-2861 print, 1923-287X online, Open Access
Article copyright, the authors; Journal compilation copyright, J Endocrinol Metab and Elmer Press Inc
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Case Report

Volume 5, Number 1-2, April 2015, pages 192-195

Treatment of Thyroxine Malabsorption


Figure 1.
Figure 1. Oral levothyroxine absorption study following 1 mg L-T4. Case 1 demonstrates a maximum of about 13% absorption of control [2].
Figure 2.
Figure 2. Oral L-T4 absorption study following 1mg L-T4. Case 2A demonstrates a maximum of about 7% absorption compared to control [2]. Case 2B demonstrates above normal absorption once patient had achieved euthyroidism using intramuscular L-T4 and was subsequently transitioned back to oral L-T4. The calculated supranormal absorption is likely related to inaccuracy of the estimated volume of distribution at high BMI.