Serum/plasma concentration of moxifloxacin (antibiotic drug level)
This test measures the amount of the antibiotic moxifloxacin in your blood. It helps your healthcare provider check if the drug is working properly and whether you need to adjust your dose.
["Your blood moxifloxacin levels help ensure the antibiotic is effective and safe for you."]
Key facts at a glance
- LOINC
- 73254-5
- Short code
- Moxifloxacin ind plt IgG SerPl Ql FC
- Synonyms
- Moxifloxacin ind plt IgG SerPl Ql FC
- Category
- hematology
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- flow-cytometry
- CPT
- 82784
- 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 Is This Test Done?
Your doctor may order this test if you’re taking moxifloxacin (a fluoroquinolone antibiotic) to treat or prevent infections. It helps assess whether the drug is reaching the right concentration in your bloodstream to fight bacteria while minimizing side effects.
What Does the Test Involve?
A blood sample is taken from a vein, usually in your arm. The sample is sent to a lab where it’s analyzed to measure the antibiotic’s concentration. No special preparation is needed, but you may want to avoid caffeine or heavy meals before the draw if instructed.
What Are Common Results?
Results are typically reported as a concentration value (e.g., micrograms per milliliter) rather than a range, as moxifloxacin levels vary based on dose, timing, and individual metabolism. Your doctor will interpret the result in relation to your treatment plan.
What Does a High or Low Level Mean?
High levels may indicate the drug isn’t being absorbed well or could increase side effects. Low levels might suggest the infection isn’t fully treated or the dose isn’t sufficient. Your doctor will discuss findings with you.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test is critical for monitoring fluoroquinolone therapy, as these antibiotics require precise dosing to balance effectiveness and safety. Abnormal levels can prompt dose adjustments, changes in treatment duration, or alternative medications.
Short name
Moxifloxacin Level
Frequently asked questions
Why might my doctor ask for this test more than once?
What should I do if I feel dizzy or lightheaded after the blood draw?
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