Skip to content

Fluoroquinolone (Antibiotic) Concentration in Serum

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

This test measures the amount of fluoroquinolone antibiotics in your blood. It helps doctors determine if the drug is working properly and whether you need adjustments to your dose.

Quick summary

["This test helps guide antibiotic treatment by checking how much of the medication is in your bloodstream."]

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

Key facts at a glance

LOINC
72266-0
Short code
FLUAV IgA Ser IA-aCnc
Synonyms
FLUAV IgA Ser IA-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
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 fluoroquinolone antibiotics (like ciprofloxacin or levofloxacin) and want to ensure the drug is at an effective level in your blood. It’s also used to check for drug levels in certain clinical settings, such as monitoring for toxicity or verifying compliance with treatment plans.

How the Test Works

A blood sample is taken from a vein in your arm. The sample is then analyzed using a sensitive laboratory method to measure the specific antibiotic concentration in your serum.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to stop certain medications (like fluoroquinolones) temporarily if your doctor directs it. Always follow your healthcare provider’s instructions.

What the Results Mean

Results are typically reported as a concentration value (e.g., micrograms per milliliter). Your doctor will interpret these results in relation to your medical condition and treatment plan.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Fluoroquinolone levels help ensure the antibiotic is effective against infections while minimizing risks like side effects or resistance. Low levels may indicate the drug isn’t working, while very high levels could signal toxicity. Your doctor will use these results to adjust your treatment if needed.

Short name

Fluoroquinolone Level

Frequently asked questions

What does a fluoroquinolone test measure?
This test measures the amount of fluoroquinolone antibiotics (like ciprofloxacin or moxifloxacin) present in your blood serum. It helps doctors assess whether the drug is at the right level for your treatment.
How long does it take to get fluoroquinolone test results?
Results are usually available within 1 to 3 business days, depending on your lab’s processing time. Your doctor will contact you once they’re ready.
Can I eat or drink before this test?
You can eat and drink normally unless your doctor instructs otherwise. Some antibiotics may require fasting, so check with your provider before the test.
  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