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Cyclosporine concentration (whole blood)

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

["This helps ensure your dose is safe and effective for your condition."]

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

Key facts at a glance

LOINC
33955-6
Short code
cycloSPORINE monocl Bld-mCnc
Synonyms
cycloSPORINE monocl 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 Is This Test Done?

Your healthcare provider may order this test to monitor your cyclosporine levels, especially if you’re taking this medication long-term or if you have kidney issues. It helps adjust your dose to avoid side effects like high blood pressure, kidney damage, or infections while keeping your immune system under control.

What to Expect Before the Test

No special preparation is usually needed. You may have a small needle inserted into your arm or hand to draw blood. If you’re on cyclosporine, your provider may check levels at regular intervals, such as 1–2 hours after taking your dose.

What the Results Mean

Results are compared to a target range your doctor sets based on your condition and response. Too high or too low levels can affect how well your medication works or cause side effects. Your provider will discuss these results with you.

Common Side Effects to Watch For

If your levels are too high, you might experience headaches, nausea, or kidney problems. If levels are too low, your immune system may overreact, increasing infection risk. Always report unusual symptoms to your doctor.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Regular monitoring is critical because cyclosporine is metabolized differently in each person. High levels can damage organs, while low levels may fail to control immune responses. Your provider may adjust your dose based on these results to balance safety and effectiveness.

Short name

Cyclosporine Blood Level

Frequently asked questions

How often should I get this test?
Your provider will determine the timing based on your medication schedule, kidney function, and other health factors. Follow their instructions closely—some patients need tests every few days initially, then less frequently as they stabilize.
What happens if my levels are too high or too low?
If levels are outside the target range, your doctor may adjust your dose, change your medication, or recommend lifestyle changes (like diet or supplements) to help stabilize your levels. They’ll explain how to manage any symptoms you’re experiencing.
Can I eat or drink before this test?
You may eat and drink normally unless instructed otherwise. Some medications (including cyclosporine) can affect results, so check with your provider if you’re unsure about timing.
  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