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Serum Gentamicin Concentration (High-Potency Form)

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

This test measures the amount of gentamicin, a powerful antibiotic, in your blood. It helps doctors monitor how well your body is handling this medication.

Quick summary

["Gentamicin levels help prevent dangerous side effects by ensuring safe dosing."]

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

Key facts at a glance

LOINC
7017-7
Short code
Gentamicin Islt AD high potency
Synonyms
Gentamicin Islt AD high potency
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
agar-diffusion-high-potency
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

Doctors may order this test if you’re taking gentamicin to treat serious bacterial infections. It helps them check if the antibiotic is working properly and at safe levels in your blood.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm or vein for a blood draw, similar to other routine blood tests.

How the Results Are Used

Your results will be compared to guidelines for gentamicin levels. If levels are too high, it may indicate your body isn’t processing the drug well, which could lead to kidney damage or other side effects.

Possible Side Effects or Risks

While rare, high levels of gentamicin can cause side effects like nausea, dizziness, or kidney problems. Your doctor will adjust your dose if needed based on your results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Gentamicin Level (Serum)

Frequently asked questions

Why was this test ordered for me?
Your doctor may have ordered this test because you’re taking gentamicin to treat a serious infection, and they want to monitor your blood levels to keep you safe and effective.
What do my results mean?
Your results show how much gentamicin is in your blood. Your doctor will review them with you to check if your dose needs adjustment for safety or effectiveness.
Can I eat or drink before this test?
You can eat and drink normally unless your doctor specifies otherwise. No fasting is required for this blood 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