Gentamicin, Trough

Message

This test is currently only available in BHS CPRS. If you are a Bedford provider, please order GENTAMICIN TROUGH(O).

Test Code

GENTAMICIN(TROUGH)

Alias/See Also

Chemistry

Preferred Specimen

Plain Red Top Tube

Minimum Volume

2 mL

Instructions

PRE (TROUGH) LEVELS should be obtained before or within 15 minutes of the next dose under steady state conditions.

Transport Temperature

Refrigerate

Specimen Stability

Refrigerated (2-8°C): 7 days
Frozen (-20°C or colder): 14 days
Avoid multiple freeze/thaw cycles

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Collected in gel tube

Methodology
EIA

Setup Schedule

Daily

Report Available

TAT 1 - 3 days

Reference Range

< 2 ug/mL

Clinical Significance

Gentamicin is an aminoglycoside antibiotic used in the treatment of gram-positive and gram-negative bacterial infections, especially Pseudomonas, Proteus, Klebsiella and Staphylococcus. Gentamicin is potentially nephrotoxic and ototoxic. Serial monitoring of peak and trough serum levels may provide the clinician with information to maintain safe and therapeutic levels.

Performing Laboratory
Test performed at West Roxbury Chemistry Lab
Contact: Jonathan Dryjowicz-Burek 857-203-5973

Last Updated: November 21, 2025

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.