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Moxifloxacin concentration in plasma (quantitative)

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

This test measures the amount of the antibiotic moxifloxacin in your blood plasma, which helps your healthcare provider assess drug levels and monitor your treatment.

Quick summary

["This test helps ensure the right dose of moxifloxacin is working effectively in your body."]

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

Key facts at a glance

LOINC
80540-8
Short code
Moxifloxacin DBS-mCnc
Synonyms
Moxifloxacin DBS-mCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 (a fluoroquinolone antibiotic) for an infection and want to confirm the drug is at an appropriate level in your blood. It’s particularly useful for monitoring long-term use or in cases where the drug might be interacting with other medications.

What to Expect Before the Test

No special preparation is needed. You may have a blood draw from a vein in your arm, similar to other routine blood tests. The process is quick and usually painless.

What the Results Mean

Results are used to guide dosing adjustments if needed. While specific reference ranges can vary by lab, they typically aim to balance adequate antibiotic levels with avoiding side effects. Your doctor will interpret the results in the context of your overall health and treatment plan.

Possible Side Effects or Considerations

Moxifloxacin can cause side effects like nausea, dizziness, or tendon pain. Rarely, it may affect certain medications or cause allergic reactions. Always inform your doctor about all medications, including over-the-counter drugs or supplements, before starting treatment.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Moxifloxacin Level

Frequently asked questions

What does a high or low moxifloxacin level mean?
High levels may indicate the drug is working too strongly in your system, potentially increasing side effects or resistance risks. Low levels could mean the infection isn’t being fully treated, so your doctor may adjust your dose.
Can I eat or drink before this test?
You can eat and drink normally unless your doctor specifies otherwise. Avoid caffeine or alcohol before the blood draw if they might affect your results.
How long will I need to wait for my results?
Results are typically available within 1–3 business days, depending on your lab. Your doctor will discuss them with you during your follow-up visit.
  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