Treatment decisions may be compromised by the use of medications that interfere with accurate thyroid function testing. A study of 170,261 patients taking levothyroxine found that around 28% were taking prednisone or prednisolone, 8% were taking amiodarone, and 1.42% were taking phenytoin. Other reported drugs that could potentially interfere included carbamazepine (0.91%), phenobarbital (0.15%), lithium (0.40%), and tamoxifen (0.11%).
Read more about drugs that interfere with thyroid-stimulating hormone (TSH) interpretation.
Medscape © 2021 WebMD, LLC
Any views expressed above are the author's own and do not necessarily reflect the views of WebMD or Medscape.
Cite this: Mary L. Windle. Fast Five Quiz: Levothyroxine - Medscape - Oct 07, 2021.