What vancomycin trough level range is typically targeted for serious infections?

What vancomycin trough level range is typically targeted for serious infections?

• A. Approximately 15–20 mcg/mL
• B. 5–10 mcg/mL
• C. 25–30 mcg/mL
• D. 40–50 mcg/mL

Answer: (A)

In vancomycin therapy, the trough level is the drug concentration just before the next dose and it helps ensure sufficient exposure over the dosing interval. For serious infections, higher exposure is needed to reliably kill bacteria, so the commonly targeted trough is around 15–20 mcg/mL. This range provides enough time above the MIC to be effective while avoiding the increased risk of nephrotoxicity and ototoxicity seen with much higher levels. Levels in the 5–10 range are generally too low for serious infections and may risk undertreatment, while levels in the 25–30 or 40–50 range are unnecessarily high and raise toxicity risk without added benefit in most scenarios. Modern practice also emphasizes AUC-guided dosing, but the 15–20 mcg/mL trough remains the standard target for serious infections.

In vancomycin therapy, the trough level is the drug concentration just before the next dose and it helps ensure sufficient exposure over the dosing interval. For serious infections, higher exposure is needed to reliably kill bacteria, so the commonly targeted trough is around 15–20 mcg/mL. This range provides enough time above the MIC to be effective while avoiding the increased risk of nephrotoxicity and ototoxicity seen with much higher levels. Levels in the 5–10 range are generally too low for serious infections and may risk undertreatment, while levels in the 25–30 or 40–50 range are unnecessarily high and raise toxicity risk without added benefit in most scenarios. Modern practice also emphasizes AUC-guided dosing, but the 15–20 mcg/mL trough remains the standard target for serious infections.