Which medications or supplements interfere with thyroid blood tests results?

Depends. Upon which blood tests are drawn. There are older tests than can be affected by estrogen or testosterone. The modern tests are immune to such interference, but certain meds and supplements can alter thyroid function, which could be reflected in abnormal thyroid test results. Check w/your doctor.

Related Questions

Always tired so I had blood tests done and they said my iron and thyroid levels are on the lower side but not deficient. Should I be taking supplement?

Need more info. From what you described thyroid and iron are not likely to be the cause of your symptoms. You may be depressed and should seek counseling as effective treatments are available. Taking iron supplement will not do any harm. Read more...