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Thyroid Cancer, Nodules & Hyperthyroidism (Expert Forum)
Taking synthroid morning of my Fasting Labs?
Answered by
Mark Lupo, M.D. - Thyroid Nodules, Thyroid Cancer, hyperthyroidism, hypothyroidism, Thyroid Ultrasound
Thyroid & Endocrine Center of Florida
Sarasota - FL
Questions in the Thyroid forum are answered by Mark Lupo, MD. Topics covered include Goiter, Graves Disease, Hyperthyroid, Parathyroid/Calcium Problems, Thyroid Cancer, Thyroid Nodules/Cysts, Thyroiditis, Thyroid & Pregnancy, Thyroid Stimulating Hormone (TSH), Thyroid Tests, and Thyroid Surgery.
GL
Hyper/Graves'/RAI
"TSH testing is not influenced by the time of day the L-T4 dose is ingested".
However, Central hypothyroidism, the daily dose of L-T4 should be withheld on the day of testing.
Complete Summary GUIDELINE TITLE Laboratory support for the diagnosis and monitoring of thyroid. guideline.gov (government)
National Academy of Clinical Biochemistry (NACB). NACB: laboratory support for the diagnosis and monitoring of thyroid disease. Washington (DC): National Academy of Clinical Biochemistry (NACB); 2002. 125 p. [495 references]
You can take your thyroid meds the same day and before test.
GL
Hyper/Graves'/RAI