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Cyclosporine Peak Blood Concentration (Mass Concentration)

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

This test measures the highest amount of cyclosporine in your blood, typically taken shortly after you’ve taken your medication dose.

Quick summary

["Peak levels help doctors monitor how well your medication is working and adjust your dose if needed."]

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

Key facts at a glance

LOINC
53834-8
Short code
cycloSPORINE Peak Bld-mCnc
Synonyms
cycloSPORINE Peak 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 if you’re on cyclosporine—a medication used to prevent organ rejection after a transplant or to treat certain autoimmune conditions. Peak levels help ensure you’re getting the right dose to avoid side effects or treatment failure.

What Does This Test Measure?

This test quantifies the concentration of cyclosporine in your blood at its highest point after you’ve taken your dose. Cyclosporine is a medication that affects your immune system.

Sample Collection and Preparation

A blood sample is drawn from a vein, usually in your arm. The sample is processed to separate the blood components and analyzed for cyclosporine levels using a specialized laboratory method.

What Does a High or Low Level Mean?

Interpreting results depends on your specific medical condition and prescribed dose. Too high levels may increase the risk of side effects like kidney problems or infections, while too low levels might mean your medication isn’t working effectively.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Peak cyclosporine levels are critical for managing immunosuppression safely. Doctors use these results to balance immune suppression and reduce the risk of organ rejection or infections. Regular monitoring helps prevent complications and optimize treatment.

Short name

Cyclosporine Peak Level

Frequently asked questions

How often should I expect this test?
Your healthcare provider will schedule this test based on your treatment plan. It may be done weekly or monthly, depending on your medication regimen and medical needs.
What happens if my test results are abnormal?
If your results are outside the recommended range, your doctor may adjust your cyclosporine dose, change your medication schedule, or recommend additional tests to ensure safety and effectiveness.
Can I eat or drink before this test?
You may need to follow specific instructions, such as fasting or timing your medication dose, but your provider will give you clear guidelines before the test.
  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