Answer
Jul 10, 2026 - 09:04 AM
Vancomycin—especially intravenous vancomycin—is considered high risk because the effective dose can be close to the dose that causes toxicity.
Key concerns include:
- Kidney injury: Vancomycin can accumulate when kidney function declines, further increasing the risk of acute kidney injury. The risk is higher with large/prolonged doses or other kidney-toxic drugs.
- Complex dosing: Doses must be individualized using weight, infection severity and kidney function. Blood levels and renal function often require monitoring.
- Infusion reactions: Administering IV vancomycin too quickly can cause flushing, itching, low blood pressure, breathing difficulty or, rarely, cardiovascular collapse. It is generally infused over at least 60 minutes.
- Hearing damage: Ototoxicity, including tinnitus or hearing loss, is uncommon but potentially serious—particularly with high exposure or other ototoxic medications.
- Narrow treatment target: For serious MRSA infections, guidelines recommend AUC-guided monitoring to maintain effectiveness while reducing toxicity.
- Rare severe reactions: These include anaphylaxis, severe skin reactions, low blood-cell counts and inflammation of the veins.
- Antibiotic resistance: Unnecessary or inappropriate use can promote vancomycin-resistant organisms.
