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Cyclosporine Blood Level (Mass Concentration)

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 your blood.

Quick summary

["Your cyclosporine level helps doctors monitor your dose to balance effectiveness and side effects."]

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

Key facts at a glance

LOINC
33956-4
Short code
cycloSPORINE polycl Bld-mCnc
Synonyms
cycloSPORINE polycl Bld-mCnc
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 This Test Matters

Cyclosporine is prescribed for conditions like organ transplants, autoimmune diseases, or severe allergies. Keeping levels in the right range helps prevent rejection or overactive immune responses. Your doctor may order this test to ensure your dose is working as intended or to adjust it if side effects occur.

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. Bring any recent medication lists to your appointment.

How the Test Works

A small sample of blood is taken from a vein in your arm. The sample is then analyzed to measure cyclosporine levels using a specialized laboratory technique.

What the Results Mean

Results are typically reported as a mass concentration (e.g., micrograms per milliliter). Your doctor will compare these results to your target range and adjust your medication if needed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Cyclosporine Level

Frequently asked questions

How often will I need this test?
Your doctor will determine the frequency based on your treatment plan, condition, and how well your body is responding to cyclosporine. Typically, tests are done weekly or monthly during active treatment.
What happens if my cyclosporine level is too high or too low?
If levels are too high, your doctor may reduce your dose or switch to a different medication. If levels are too low, they may increase your dose or check for interactions with other medications you’re taking.
Can I eat or drink before this test?
You may need to fast for a few hours before the test, but always follow your doctor’s specific instructions. Avoid caffeine or heavy meals as they might affect test results.
  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