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Serum or Plasma Concentration of Moxifloxacin (Antibiotic Drug Level)

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

This test measures the amount of the antibiotic moxifloxacin in your blood or plasma. It helps healthcare providers check if your dose is working effectively and adjusts treatment as needed.

Quick summary

["This test helps ensure your antibiotic is at the right level to fight infection safely."]

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

Key facts at a glance

LOINC
93497-6
Short code
Moxifloxacin Islt Slgr Mcbct AB 3.0
Synonyms
Moxifloxacin Islt Slgr Mcbct AB 3.0
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-antibiotic-concentration-at-ug-ml
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 moxifloxacin to treat or prevent bacterial infections. It helps monitor whether the drug is reaching the right amount in your body to kill germs while avoiding side effects.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample (usually from a vein in your arm) or, if specified, urine or other fluid. The test is quick and painless.

What the Results Mean

Results aren’t always given in numbers for this test, as they’re often interpreted by your doctor based on your medical history and symptoms. Low levels may mean the drug isn’t working, while very high levels could signal side effects.

Possible Side Effects or Risks

Moxifloxacin is generally safe when used as directed, but high levels in the blood can sometimes cause nausea, dizziness, or allergic reactions. Rarely, it may affect your heart rhythm or cause tendon damage.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Monitoring Drug Effectiveness and Safety

Short name

Moxifloxacin Level

Frequently asked questions

Why is this test important for my treatment plan?
This test helps doctors confirm whether your moxifloxacin dose is effective against your infection and whether it’s safe for you. It prevents overuse (which can lead to resistance) or underuse (which may leave an infection untreated).
What if my test results are outside the usual range?
Your doctor will discuss the results with you. If levels are too low, they may adjust your dose. If levels are too high, they might recommend stopping or changing medications to avoid side effects.
Can I eat or drink before this test?
For blood tests, you can eat and drink normally unless your doctor specifies otherwise. For urine tests, follow any instructions given with your test order, as some may require fasting or specific timing.
  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