Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

I am taking the diuretic furosemide (Lasix) and my thyroid tests are now abnormal-is there a connection?

April 26, 2017connection diuretic furosemide lasix taking tests Thyroid

0

Posted

I am taking the diuretic furosemide (Lasix) and my thyroid tests are now abnormal-is there a connection?

1 Answer

0

Posted

Some assays that measure free thyroid hormone levels may give abnormal results due to an interaction between the drug and thyroid binding proteins, leading to a spurious increase in levels of Free T4 and Free T3, as outlined in Effect of oral frusemide on diagnostic indices of thyroid function Clin Endocrinol (Oxf). 1987 Apr;26(4):423-31 and Interaction of furosemide with serum thyroxine-binding sites: in vivo and in vitro studies and comparison with other inhibitors J Clin Endocrinol Metab.