You will be asked to supply a blood sample for the test. Whenever you need to observe any special instructions, such as discontinuing medication before doing the test, your doctor will let you know.
Inform your doctor about all of the medications, vitamins, and supplements you are taking. If you use herbs or other natural supplements, they should be mentioned as well.
A needle linked to a syringe will be used to take blood from a vein in your arm during the test. When the needle is inserted, you will feel a pricking sensation that will not be overly painful and will not last long. The entire procedure is normally completed in a matter of minutes.
If you are nervous about taking blood or using needles and syringes in general, speak with your healthcare provider so that they can make you feel more at ease throughout the test.
When the test is completed, you will be told of the findings and how to obtain them.