Gentamicin trough concentration in serum/plasma

Why Is This Test Done?

Doctors order a gentamicin trough test if you’re taking gentamicin (an antibiotic) to treat serious infections, such as those caused by bacteria like *Pseudomonas* or *Staphylococcus*. It helps monitor how much of the drug stays in your bloodstream to prevent toxicity while ensuring the infection is treated properly.

What Does the Test Involve?

A blood sample is drawn from a vein, usually in your arm. The sample is sent to a lab where the gentamicin level is measured. The test focuses on the lowest point of the drug’s concentration in your blood, known as the ‘trough’ level, to assess its effectiveness.

What Are Common Uses?

This test is most commonly used in hospitalized patients receiving intravenous gentamicin, especially those with kidney issues or infections requiring high doses. It helps adjust the dose to avoid over-exposure, which can damage kidneys or nerves.

How Often Is This Test Done?

The frequency depends on your treatment plan. Typically, it’s done once or twice weekly to check levels, especially if you’re receiving high doses or have kidney problems. Your doctor will decide based on your medical needs.