eng Science and Education Publishing American Journal of Medical Case Reports 2014-11-11 2 11 253 255 10.12691/ajmcr-2-11-8 AJMCR20142118 article Muhammad Imran Butt 1 Nidhi Gupta 1 Hiang Leng Tan hiangleng@doctors.org.uk 2 Najeeb Waheed 3 Department of Diabetes and Endocrinology, Peterborough City Hospital, Peterborough, UK Department of Diabetes and Endocrinology, Weston General Hospital, Weston-super-Mare, UK Department of Diabetes and Endocrinology, Hereford County Hospital, Hereford, UK We present a variation and clinical application of the Levothyroxine Absorption Test (LAT) in the identification of pseudo-malabsorption of levothyroxine in uncontrolled hypothyroidism, for which there is no current gold standard protocol, and a variety of methods proposed in the literature. The LAT was conducted over 5-days with thyroid function tests conducted pre-LAT, then at day 1 and 5. The thyroid stimulating hormone levels became completely suppressed indicating that there had been previous non-compliance with medication. http://pubs.sciepub.com/ajmcr/2/11/8/ajmcr-2-11-8.pdf levothyroxine absorption test non-compliance pseudo-malabsorption