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Also known as: Thiopurine s-methyltransferase

At a Glance

Why Get Tested?

The detection of patients who are at risk of developing severe side effects if treated with the thiopurine drugs, azathioprine, mercaptopurine and thioguanine

When to Get Tested?

Prior to thiopurine drug treatment

Sample Required?

A single blood sample taken from a vein in your arm

Test Preparation Needed?

There are no special preparations needed to collect the blood.