Abstract
Influences of non-steroidal anti-inflammatory drugs (NSAID) on concentrations of thyroid hormones are known for a long time. These effects could be explained with interference between NSAIDs and thyroid hormone binding. We investigated the effects of a single dose of aceclofenac on thyroid function and thyroid hormone binding in 18 healthy volunteers. Serum levels of free thyroid hormones (FT3, FT4) and thyrotropin (TSH) were measured with commercial available kids and thyroid hormone binding was estimated with a specially modified horizontal argarose-gel-electrophoresis prior to and 2 hours after receiving a single dose of aceclofenac. We found a significant decrease in T3 binding on TBG and a significant increase of albumin-bound T3. All other investigated thyroid hormone binding parameters, FT3 and FT4, showed no significant changes. We conclude that aceclofenac leads to a significant redistribution of T3 protein binding. These effects seem to be explained by T3 displacement from TBG induced by aceclofenac.
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