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Fluconazole (Substance) Concentration in Serum

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

This test measures the amount of the antifungal medication fluconazole in your blood serum. It helps your healthcare provider check if your dose is working properly and adjust it if needed.

Quick summary

["Fluconazole levels help ensure your medication is effective against fungal infections while avoiding unnecessary side effects."]

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

Key facts at a glance

LOINC
7932-7
Short code
FLUCV Ab Ser-aCnc
Synonyms
FLUCV Ab Ser-aCnc
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 This Test Is Done

Your doctor may order this test if you’re taking fluconazole to treat or prevent fungal infections, such as yeast infections in the blood, throat, or other areas. It’s also used to monitor long-term treatment or in people with weakened immune systems.

How the Test Works

A blood sample is taken from a vein in your arm. The sample is sent to a lab where it’s analyzed using an immunoassay method to detect fluconazole in your serum.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for a few hours if your doctor specifies it. Let your healthcare provider know about any medications or supplements you’re taking, as they could affect results.

What to Expect During the Test

The blood draw is quick and typically painless. You may feel a slight pinch or discomfort, but most people tolerate it well. You can resume normal activities immediately afterward.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Fluconazole Level

Frequently asked questions

How often should fluconazole levels be checked?
The frequency depends on your condition, dose, and how long you’ve been taking fluconazole. Your doctor may check levels more often at the start of treatment or if you have certain health conditions (e.g., liver/kidney problems). Follow their guidance closely.
What can affect fluconazole test results?
Several factors may influence results, including other medications you’re taking (e.g., certain antibiotics or antifungals), liver or kidney disease, and even dehydration. Always inform your doctor about all medications and health changes before testing.
Is there anything I should avoid before the test?
Avoid taking fluconazole for at least 24 hours before the test if possible, as it may skew results. If you’re unsure, ask your doctor. Also, let them know if you’ve had recent illnesses or changes in your diet, as these could impact blood composition.
  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