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Cyclosporine Blood Level (Pharmacokinetic Monitoring)

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of cyclosporine, a medication used to prevent organ rejection or suppress immune responses in certain conditions, in your blood. It helps doctors determine if your dose is appropriate for your needs.

Quick summary

["Your cyclosporine level helps ensure this medication works safely at the right dose for you."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
99413-7
Short code
cycloSPORINE Bld-AUC
Synonyms
cycloSPORINE Bld-AUC
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Doctors may order this test if you’re taking cyclosporine to manage conditions like organ transplants, severe autoimmune diseases, or certain cancers. Regular monitoring helps prevent side effects and ensures the medication stays within safe therapeutic ranges.

What Does the Test Measure?

The test quantifies the concentration of cyclosporine in your blood. This helps track how well your body is processing the drug and whether your dose needs adjustment.

How Is the Test Performed?

A blood sample is taken from a vein, usually in your arm. The sample is sent to a lab where it’s analyzed using an immunoassay method to measure cyclosporine levels.

What Do Results Mean?

Results provide a specific concentration value of cyclosporine in your blood. Your doctor will interpret these results alongside your medical history and symptoms to guide dosing adjustments.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Cyclosporine Level

Frequently asked questions

Why might my cyclosporine level be checked more often?
Your doctor may request more frequent tests if you’re experiencing side effects, have changes in kidney function, or if you’re adjusting your dose. Certain medications or health conditions can also affect how cyclosporine is processed in your body.
What are common side effects of cyclosporine?
Common side effects may include kidney problems, high blood pressure, tremors, or increased risk of infections. If you notice unusual symptoms, discuss them with your healthcare provider.
How can I help ensure my cyclosporine levels stay within the right range?
Follow your doctor’s instructions for taking cyclosporine exactly as prescribed. Avoid missing doses or altering the medication without approval, and report any changes in health or symptoms promptly.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy