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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 after a transplant or to treat certain autoimmune conditions, in your blood. It helps your healthcare provider determine the correct dosage for you.

Quick summary

["This test ensures your cyclosporine dose stays within safe therapeutic levels to balance effectiveness and side effects."]

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

Key facts at a glance

LOINC
4207-7
Short code
cycloSPORINE Dose
Synonyms
cycloSPORINE Dose
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your doctor may order this test if you’re taking cyclosporine to check if your blood levels are within the recommended range. This helps prevent side effects like high blood pressure, kidney problems, or infections while ensuring the medication works properly.

How Is the Sample Collected?

A small blood sample is taken from a vein in your arm. You may feel a slight pinch, but it usually doesn’t cause much discomfort. The sample is sent to a lab for analysis.

What Does the Test Result Mean?

Results help your doctor adjust your cyclosporine dose if needed. Very high or very low levels can indicate problems, so follow your doctor’s guidance on interpreting results.

Common Reasons for Testing

Tests are often done regularly (e.g., weekly or monthly) after starting cyclosporine or when your dose changes. They may also be checked if you experience symptoms like nausea, tremors, or unusual fatigue.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Cyclosporine Level

Frequently asked questions

How often should cyclosporine levels be checked?
Your doctor will determine the schedule based on your treatment plan, how long you’ve been on the medication, and your health status. It’s usually not done just once—it’s part of an ongoing process to adjust your dose as needed.
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 anything before the test?
You may need to fast for a few hours before the test, depending on your doctor’s instructions. Always follow their specific guidelines to ensure accurate 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