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Fluconazole Concentration in Serum/Plasma

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

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

Quick summary

["Knowing your fluconazole levels helps doctors monitor your treatment and prevent side effects."]

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

Key facts at a glance

LOINC
73019-2
Short code
Fluconazole (neut) IgM SerPl Ql FC
Synonyms
Fluconazole (neut) IgM SerPl Ql FC
Category
chemistry
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 doctor may order this test if you’re taking fluconazole to treat or prevent fungal infections, such as candidiasis (yeast infections). It helps ensure the drug is working at the right level in your body.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. If you’re on long-term treatment, your doctor may schedule this test during routine check-ups.

What the Test Results Mean

Results help doctors check if your fluconazole levels are within the safe range for your condition. Too little may mean the infection isn’t fully treated, while too much could cause side effects.

Common Uses and Conditions

This test is commonly used in patients with fungal infections (e.g., thrush, meningitis caused by fungi) or those with weakened immune systems (e.g., HIV/AIDS, chemotherapy patients). It may also be used in monitoring long-term antifungal therapy.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance: Elevated levels may indicate overdose or poor drug metabolism, while low levels suggest insufficient treatment. Regular monitoring is critical for patients with kidney issues, as fluconazole is processed by the kidneys.

Short name

Fluconazole Level

Frequently asked questions

How often should I get this test?
Your doctor will determine the timing based on your treatment plan, medication dose, and kidney function. Typically, tests may be done weekly during initial treatment or less frequently if stable.
What are typical side effects of fluconazole?
Common side effects include nausea, stomach pain, or rash. Rare but serious side effects include liver problems or allergic reactions. If you experience severe symptoms, seek medical attention immediately.
Can I drink alcohol before or after this test?
Alcohol may interact with fluconazole and could affect test results or your medication’s effectiveness. Avoid alcohol until your doctor gives specific instructions.
  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