Free Thyroxine test is performed on a sample of blood to measure level of FT4 in blood.It is performed to confirm Hyperthyroidism and Hypothyroidism and also during treatment and after treatment of Hyperthyroidism and Hypothyroidism.
Also known as
Inform your doctor if you are on any medications, have any allergies or underlying medical conditions before your Free T4. Your doctor will give specific instructions depending on your condition on how to prepare for Free T4. 10 to 12 Hours fasting is required before the sample collection.
The normal result for Free T4 for FT4 is 4.5 - 11.7 mcg/dl for Unisex gender and for All age groups.