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Voriconazole Concentration (Serum/Plasma)

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

This test measures the amount of voriconazole, a medication used to treat certain types of fungal infections, in your blood.

Quick summary

["Knowing your voriconazole levels helps doctors monitor your treatment and avoid potential side effects."]

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

Key facts at a glance

LOINC
73080-4
Short code
Voriconazole ind plt IgM SerPl Ql FC
Synonyms
Voriconazole 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 voriconazole to ensure the drug is working properly and at the right level in your body. It’s often checked during treatment to prevent toxicity or insufficient effectiveness.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm or vein to draw a blood sample. It usually takes a few minutes, and you may feel a slight pinch.

What the Test Results Mean

Results help your doctor adjust your dose if needed. While specific ranges vary by patient, low levels may mean the drug isn’t strong enough, while very high levels could indicate side effects.

Common Uses and Considerations

Voriconazole is used for serious fungal infections like aspergillosis or candidemia. It’s important to take it exactly as prescribed and report any unusual symptoms, such as skin rash, nausea, or vision changes.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Voriconazole Level

Frequently asked questions

How often is this test typically done?
This test is often checked weekly during treatment, then less frequently as your condition stabilizes. Your doctor will determine the timing based on your specific situation and how you respond to the medication.
Can I eat or drink before this test?
You can eat and drink normally before the test, as it doesn’t require fasting. However, always follow your healthcare provider’s instructions for any special instructions.
What are some side effects of voriconazole?
Common side effects may include nausea, headache, or skin rash. Less common but serious side effects can include vision changes, liver problems, or allergic reactions. Always report any concerning symptoms to your doctor.
  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