Vancomycin blood level
Quick answer: This test measures the amount of vancomycin, a strong antibiotic, in your blood. It helps doctors keep the dose high enough to treat serious infection while limiting harm to the kidneys.
- SampleBlood
- TakesAbout 5 minutes, or less if drawn from an existing line
- Before the testThe sample is timed in relation to your dose; the care team will arrange this.
How the test is done
- 1Vancomycin is given through a drip in hospital
- 2Blood is drawn at a set time, often just before the next dose
- 3Kidney function is checked at the same time
- 4The team adjusts the dose based on the level
What your results can mean
Reading your report
Your care team will adjust the dose based on the result and your kidney function.
If the result is outside the usual range
A high level can raise the risk of kidney damage and, rarely, hearing problems. A low level may not treat the infection well enough.
Who usually has this test
People receiving vancomycin for serious infections, usually in hospital.
Risks and aftercare
Bruising is possible; tell the team about any change in passing urine or in your hearing.
Names and options
Also called: vancomycin trough, vancomycin test
Listed by the hospital as
- VANCOMYCIN, SERUM
Questions about this test
Why is the blood level of vancomycin checked?
The right dose varies between people, especially with kidney problems. Checking levels helps keep the dose effective and safe.
When is the blood for a vancomycin level taken?
It is usually taken just before the next dose, called a trough level. Some hospitals use other timed levels.
What infections is vancomycin used for?
It is used for serious infections, such as those caused by MRSA, in the blood, bone or heart valves. It is usually given through a vein in hospital.
Related tests
Tamara Hospital & IVF Centre, Rajajinagar
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This page explains each test in general terms so you know what to expect. It is not medical advice: your doctor decides which tests you need and what your results mean. Reference ranges differ between laboratories. Updated 4 November 2026.