Serum/plasma concentration of sulindac (a metabolite of sulindac acid)

Why This Test Might Be Ordered

Your healthcare provider may order this test if you’re taking sulindac—a nonsteroidal anti-inflammatory drug (NSAID) used to treat conditions like arthritis or pain. They might also check it if you have kidney issues or if you’re experiencing unusual side effects. It can help ensure the drug is working safely and effectively in your body.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for a few hours before the blood draw. Wear a loose shirt for easy access. If you’re on other medications or have health conditions, let your lab technician know beforehand.

What Happens During the Test

A small needle will be inserted into a vein in your arm. Blood will be drawn into a tube. The process takes a few minutes, and you may feel a brief pinch. The blood is then sent to a lab for analysis.

What the Results Mean

Results show the concentration of sulindac metabolites in your blood. High levels might indicate poor kidney function or improper drug metabolism, while low levels could suggest the drug isn’t working as intended. Your provider will interpret these results in the context of your medical history and symptoms.