Cyclosporine concentration (serum/plasma)

Why This Test Matters

Cyclosporine is a powerful medication that works by suppressing your immune system. Keeping your levels within a target range is crucial to avoid side effects like infections or organ damage while ensuring the medication works properly. Your doctor may order this test to check if your dose is correct, especially if you’re taking it for long-term use or after a transplant.

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 test if it’s drawn in the morning. Bring a list of all medications you’re taking, including supplements, as some can affect your results. If you’re pregnant, breastfeeding, or have allergies, let your healthcare provider know.

What the Test Involves

A healthcare professional will draw blood from a vein in your arm. The blood sample will be sent to a lab for analysis using a technique called immunoassay, which detects the presence of cyclosporine in your serum or plasma.

What the Results Mean

Results are typically reported as a mass concentration (in micrograms per milliliter or nanograms per milliliter). Your doctor will compare these results to your target range, which may vary based on your condition, age, and other factors. If your levels are too high or too low, your doctor may adjust your medication dose.