Free Thyroxin Index (FTI) Test

What is the Free Thyroxin Index (FTI) Test?

The free thyroxin index (FTI) test is a blood test conducted to diagnose disorders of the thyroid. Thyroxine (T4) is a thyroid hormone and this particular test finds out how much of it is present in your blood. It determines if the thyroid gland is overactive (hyperthyroidism) or underactive (hypothyroidism). 

This test is very helpful in finding out the activity of the thyroid gland. This is good to know the performance of the thyroid gland and the hormones released by the gland. This can then prevent you from several thyroid diseases like Goiter, Grave’s Disease, Hashimoto’s disease, and in severe cases Thyroid Cancer

This test is also known as the T4 Index (FTI) Test/ Free T4 Index Test/ FTI Blood Test, T4 concentration, thyroxin screen, and free T4 Concentration.

FTI Test Price in Pakistan

Free thyroxin test price in Pakistan ranges between (2000-3000) Rupees. The FTI test cost in Pakistan varies depending upon the lab and city you are choosing to get your test. However, to get a discount on FTI test prices in Karachi, Lahore, Islamabad, Rawalpindi, Multan, and other major cities, you can book your FTI test from Healthwire.

How can I Book FTI Blood Test Near Me?

You can easily book an FTI test online. For efficient service and affordable FTI test prices in Lahore, Karachi, Islamabad, Rawalpindi, and other major cities, you can rely on Healthwire. You can call us at 042352500989/02137130261 or click on the test for instant booking of the FTI test.

To book your Free Thyroxine Index Test:

  • You can simply click on the lab test online via our web healthwire. pk or Healthwire app 
  • Select Free Thyroxine Test (FTI) test or upload prescription
  • Pay in cash or online (debit/credit card, jazzcash)
  • Our representative will call you for confirmation

You can also call us at 042352500989  or click on the test for instant booking. You can also avail discount on the FTI test cost if you book your test via Healthwire.

When is a T4 Index Test Performed?

There is always a need to get this test done if you are noticing the following changes in your body or the below-mentioned symptoms are appearing more than usual. If you have a hyperactive thyroid then keep a look when you feel: 

If you are having the symptoms mentioned below then your thyroid is underactive and you need to get the test done:

  • Constipation
  • Carpel tunnel syndrome
  • Shortness of breath
  • Slower heart rate
  • Hair loss
  • Low tolerance for cold
  • Swelling in the eye
  • Hypertension or high blood pressure

How to Interpret a Free Thyroxin Index FTI Test Results?

In order to interpret ± thyroxin levels to test you need to look at these normal ranges and then compare them with yours. 


Name of hormone

Reference Range


Free T4

7 - 16


If the ranges go below the reference then you are suffering from hypothyroidism and if it exceeds that then you have hyperthyroidism. 



Book this lab test?

Free Thyroxin Index (FTI) Test

Rs. 2125.0 Rs. 2500

Frequently Asked Questions (FAQs)

Sub Total
Rs. 2500 Rs. 2125.0