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Gentamicin

Medicine levels · also printed as Gentamicin level, Gentamicin trough, Gentamicin pre-dose, Serum gentamicin, Gent level

Typical UK adult rangebelow 1 mg/L

The chart specifies the target for the timing used; the printed range applies.

What this test measures

Gentamicin is an antibiotic given by injection in hospital for serious infections. Levels are measured because too much can harm the kidneys and hearing.

Why doctors request it

Measured in hospital during treatment, often every one to three days.

What commonly pushes it up

Kidney disease
A sample taken too soon after the injection

What commonly pushes it down

A larger body size or high kidney clearance
A sample taken late

Everyday reasons for a value outside the range

The timing relative to the injection defines which range applies
Pre-dose and post-dose ranges are entirely different

About the sample

Before the next injection, or at a set time after it depending on the hospital's chart.

Written by a UK consultant physician. Typical UK adult reference ranges; your laboratory's own printed range takes precedence.

Got a report with Gentamicin on it?

Upload a photo or PDF and see every line against the range your lab printed, explained in plain English. First report free.

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This is an educational summary of results you uploaded. It is not medical advice, a diagnosis or a treatment plan, and it does not replace the doctor who requested the test. If you are worried, or a result is marked outside range, discuss it with your doctor. Written and reviewed by a UK consultant physician. Reference ranges vary between laboratories.