Norfloxacin (Antibiotic) Quantitative Urine Concentration
This test measures the amount of norfloxacin, a fluoroquinolone antibiotic, present in your urine. It helps assess drug levels to guide treatment and monitor effectiveness.
["This test helps doctors check if your norfloxacin dose is working properly."]
Key facts at a glance
- LOINC
- 41504-2
- Short code
- Norfloxacin Islt SlowMyco
- Synonyms
- Norfloxacin Islt SlowMyco
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- method-for-slow-growing-mycobacteria
- CPT
- 86430
- 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 norfloxacin to treat or prevent infections like urinary tract infections (UTIs), respiratory infections, or certain skin or bone infections. It helps ensure the right amount of medication is in your system to fight bacteria without causing unnecessary side effects.
How the Test Works
A urine sample is collected, typically after you’ve taken your medication as directed. The sample is tested to measure how much norfloxacin is present, often using a method like high-performance liquid chromatography (HPLC) or immunoassay. This helps determine whether your dose is therapeutic (effective) or needs adjustment.
What to Expect Before the Test
No special preparation is usually needed, but follow your doctor’s instructions. If you’re taking other medications, let your provider know to avoid potential interactions. Drink plenty of fluids unless advised otherwise, as this can help dilute urine for accurate results.
What to Expect During the Test
You’ll likely provide a urine sample in a clean container, often at a lab or clinic. If you’re at home, follow the instructions provided with the collection kit. The test itself is quick and painless—just urinating into a container.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
High norfloxacin levels in urine may indicate adequate treatment, while very low levels could suggest insufficient dosing or poor absorption. Your doctor will use these results to adjust your medication, especially if you’re experiencing side effects or the infection isn’t improving. This test is particularly useful for monitoring patients with kidney issues, as it helps avoid toxic buildup.
Short name
Norfloxacin in Urine
Frequently asked questions
How long does it take to get results?
What does a low or high level of norfloxacin mean?
Can I drink alcohol before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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