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Moxifloxacin Concentration in Serum/Plasma

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

This test measures the amount of the antibiotic moxifloxacin in your blood. It helps determine if your dose is working effectively and if you’re responding to treatment.

Quick summary

["This test helps doctors check how your body is handling the antibiotic moxifloxacin."]

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

Key facts at a glance

LOINC
76044-7
Short code
Moxifloxacin Islt Slgr Mcbct AB 1.0
Synonyms
Moxifloxacin Islt Slgr Mcbct AB 1.0
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 healthcare provider may order this test if you’re taking moxifloxacin for an infection, such as pneumonia, skin infections, or certain types of urinary tract infections. It helps ensure the drug is at an effective level in your blood without causing harmful side effects.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm or vein to draw blood. If you’re on a long-term course, your provider may check levels at different times during treatment.

What the Results Mean

Results help your doctor adjust your dose if needed. Low levels may mean the drug isn’t working well, while very high levels could indicate problems like kidney issues or improper dosing.

Common Reasons for Testing

Doctors check moxifloxacin levels to confirm the drug is working, prevent resistance, or manage side effects in people with kidney problems.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Moxifloxacin is a fluoroquinolone antibiotic used to treat serious bacterial infections. Measuring its concentration in blood helps ensure therapeutic effectiveness and reduces the risk of antibiotic resistance or toxicity, especially in patients with kidney dysfunction or those on multiple medications.

Short name

Moxifloxacin Level

Frequently asked questions

Will I need to fast before this test?
No fasting is required. However, inform your doctor about any other medications or supplements you’re taking, as they may affect results.
How long will it take to get my results?
Results are typically available within 1–3 business days, depending on your lab. Your doctor will discuss them with you.
Can I drink water before the blood draw?
Yes, you can drink water unless your doctor advises otherwise. Avoid caffeine or alcohol 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