Fungicidal Activity of Caspofungin (Serum/Plasma) – Quantitative
This test measures the amount of the antifungal medication caspofungin in your blood to ensure it’s working properly and at the right level.
["Your doctor may check this to adjust your dose and avoid side effects."]
Key facts at a glance
- LOINC
- 73476-4
- Short code
- Caspofungin ind plt IgM SerPl Ql FC
- Synonyms
- Caspofungin ind plt IgM SerPl Ql FC
- Category
- hematology
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- flow-cytometry
- CPT
- 82784
- 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 This Test Is Done
Your healthcare provider may order this test if you’re taking caspofungin (a medication used to treat serious fungal infections) and want to confirm the drug is present in your blood at the correct concentration. It helps ensure the medication is effective and safe for you.
What to Expect Before the Test
No special preparation is needed. You may have a small needle inserted into your arm or vein for drawing blood, similar to a regular blood test. If you’re on blood thinners, let your provider know before the test.
What the Test Results Mean
Results are compared to a reference range specific to caspofungin, but exact values depend on your dose and medical condition. Low levels may mean the drug isn’t working well, while very high levels could indicate issues like kidney problems or improper dosing.
Possible Side Effects or Considerations
Caspofungin itself doesn’t cause direct lab test interference, but other medications or conditions (like liver/kidney disease) may affect how it’s measured. Always share your full medication list with your provider.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Monitoring caspofungin levels is critical for patients with fungal infections, as it helps prevent resistance and ensures therapeutic efficacy without toxicity. Abnormal results may prompt dose adjustments or further evaluation of infection control.
Short name
Caspofungin Level (Serum/Plasma)
Frequently asked questions
Why might my doctor want to check this test more often?
What if my test results are outside the expected range?
Can I eat or drink before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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