Gentamicin Serum Concentration (High-Potency Monitoring)
This test measures the amount of gentamicin, a powerful antibiotic, in your blood. It helps doctors monitor how well your body is handling the medication and whether it’s safe to continue using it.
["Gentamicin levels help prevent dangerous side effects and ensure the drug remains effective against infections."]
Key facts at a glance
- LOINC
- 18929-0
- Short code
- Gentamicin Islt High potency
- Synonyms
- Gentamicin Islt 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
- 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 Is This Test Done?
Your doctor may order this test if you’re taking gentamicin to treat serious bacterial infections, such as those in your blood, bones, or kidneys. It’s especially important for patients with kidney issues or those receiving high doses of the medication. The test helps ensure the antibiotic stays at the right level to fight infection without harming your kidneys or other organs.
What Does the Test Measure?
Gentamicin is a broad-spectrum antibiotic used to treat severe bacterial infections. This test measures its concentration in your serum (liquid part of blood). High levels can damage your kidneys or nerves, while low levels may mean the infection isn’t fully treated.
How Is the Test Performed?
A blood sample is taken from a vein, usually in your arm. The sample is sent to a lab where it’s analyzed to determine the gentamicin concentration. Results are typically ready within 24 hours.
What Do the Results Mean?
Results are compared to guidelines based on your kidney function and dose of gentamicin. Too high or too low levels can affect your treatment. Your doctor will discuss the results with you and may adjust your medication if needed.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance: Monitoring Gentamicin Levels Prevents Harm and Ensures Effectiveness
Short name
Gentamicin Level (Serum)
Frequently asked questions
How often should I expect this test?
What are the possible side effects of gentamicin?
Can I eat or drink before the blood 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