{"id":"vancomycin-trough","name":"Vancomycin (Trough)","shortName":"Vancomycin trough","aliases":["Vancomycin Trough Level","Vancomycin, Trough","Vancomycin Trough","Vanco Trough","Vancocin"],"abbreviations":[],"loinc":[{"code":"4092-3","primary":true},{"code":"39797-6","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"ug/mL","display":"µg/mL"},{"ucum":"mg/L","display":"mg/L"},{"ucum":"umol/L","display":"µmol/L"}],"referenceRanges":[{"population":"Adults","low":10,"high":20,"unit":"ug/mL","unitDisplay":"µg/mL","note":"Quest's published trough interval (printed as 10.0–20.0 mg/L, the same as µg/mL) for a sample drawn just before the next dose. Since 2020, the ASHP/IDSA/PIDS/SIDP guideline no longer recommends targeting a 15–20 mg/L trough for serious MRSA infections and recommends dosing to an AUC of 400–600 mg·h/L instead, so many hospitals now calculate AUC from one or two levels. The right target depends on the infection and on your care team's protocol.","sources":[{"title":"Vancomycin, Trough (test code 8579)","url":"https://testdirectory.questdiagnostics.com/test/test-detail/8579/vancomycin-trough?cc=MASTER","publisher":"Quest Diagnostics"},{"title":"Therapeutic monitoring of vancomycin for serious methicillin-resistant Staphylococcus aureus infections: A revised consensus guideline and review by the ASHP, IDSA, PIDS and SIDP","url":"https://doi.org/10.1093/ajhp/zxaa036","publisher":"American Journal of Health-System Pharmacy","year":2020},{"title":"A Canadian perspective on the revised 2020 ASHP-IDSA-PIDS-SIDP guidelines for vancomycin AUC-based therapeutic drug monitoring for serious MRSA infections","url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC9612435/","publisher":"Journal of the Association of Medical Microbiology and Infectious Disease Canada","year":2021}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"The lowest vancomycin level in your blood, drawn right before your next dose, used to check this IV antibiotic is working without building up.","url":"https://bloodtesttracker.com/markers/vancomycin-trough","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}