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Ciprofloxacin Concentration (Serum/Plasma)

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

This test measures the amount of the antibiotic ciprofloxacin in your blood, helping doctors assess whether your dose is working effectively and monitor for potential side effects.

Quick summary

["Your ciprofloxacin levels help ensure you’re getting the right dose and avoid unnecessary exposure."]

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

Key facts at a glance

LOINC
187-5
Short code
Ciprofloxacin Titr SBT
Synonyms
Ciprofloxacin Titr SBT
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
sbt
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 Matters

Ciprofloxacin is a fluoroquinolone antibiotic used to treat bacterial infections. Your doctor may order this test to check how your body is processing the drug, especially if you have kidney issues or take other medications that interact with it.

What to Expect Before the Test

No special preparation is needed, but you may be asked to fast for a few hours before the blood draw if instructed by your healthcare provider. Bring a list of all medications you’re taking, including over-the-counter drugs.

Your blood will be drawn from a vein, usually in your arm. This is a quick process that typically takes a few minutes. You may feel slight discomfort, but it should be brief.

The blood sample is sent to a lab where it is analyzed to measure ciprofloxacin levels. Results are usually available within 24–48 hours, depending on your lab.

What the Results Mean

Results are compared to a standard range to determine if your levels are therapeutic (effective) or if adjustments to your medication are needed. Your doctor will discuss these results with you during your follow-up visit.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Antibiotic Level

Frequently asked questions

How long does it take to get my results?
Results are typically ready within 24 to 48 hours, but this can vary by lab. Your healthcare provider will contact you once they are available.
Can I eat or drink before the blood test?
No special diet is required, but some labs may ask you to fast for a few hours before the draw. Always follow your doctor’s instructions.
Will I experience any side effects from the blood draw?
You may feel slight bruising, soreness, or a small bump at the site, but these are usually mild and temporary. Rarely, there could be a slight bruise or swelling.
  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