Vancomycin (Renal Dosing)

How it works

It inhibits bacterial cell-wall synthesis by binding peptidoglycan precursors, giving activity against MRSA and other resistant Gram-positive organisms. It is cleared almost entirely by the kidneys, so impaired renal function prolongs its half-life.

Prescribing in practice

• Vancomycin is nephrotoxic and accumulates in renal impairment, so doses and intervals must be guided by renal function and serum-level monitoring to avoid further kidney injury — this is the central safety requirement.
• Maintenance dosing is adjusted to achieve target trough or AUC exposure rather than fixed regimens, as under-dosing risks failure and over-exposure risks toxicity.
• Combining with other nephrotoxins such as aminoglycosides or piperacillin-tazobactam increases the risk of acute kidney injury and warrants closer surveillance.

Monitoring

Monitor serum vancomycin levels (trough or AUC-guided) together with renal function regularly, adjusting dose and interval to stay within the therapeutic target.

Counselling the patient

• This antibiotic is given by a drip and your blood levels will be checked.
• Tell staff about any flushing, rash or reaction during the infusion.
• Report reduced urine output or new hearing changes.

Evidence & guidelines

UK and international consensus guidelines recommend AUC-guided or trough-based therapeutic drug monitoring with renal dose adjustment to balance efficacy against nephrotoxicity.