Vancomycin

Prescription ·Exploratory record · not publication-reviewed ·Updated July 13, 2026

Vancomycin is a glycopeptide antibiotic used to treat serious Gram-positive infections, most notably methicillin-resistant Staphylococcus aureus (MRSA). It is given intravenously for systemic infections and orally for Clostridioides difficile (C. difficile) infection, where the oral form stays in the gut and is not meaningfully absorbed. Because of its narrow therapeutic window and potential for kidney and ear toxicity, intravenous use typically requires therapeutic drug monitoring.

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Publication status

Exploratory record, not a reviewed medical publication.

See the editorial and medical-review policies for the publication gate.

This generated database record has not completed a claim-level review by a qualified human medical reviewer. Bibliography links and evidence labels are not approval. The page remains available for reference and is excluded from search indexing.

In short

What the research says.

A quick, data-only summary. The full evidence, dosing, and sources are below.

Vancomycin is a glycopeptide antibiotic used to treat serious Gram-positive infections, most notably methicillin-resistant Staphylococcus aureus (MRSA). NutriStack rates the supporting evidence as strong. Common adult dosing is IV: 15-20 mg/kg every 8-12 hours (dosed by actual body weight and adjusted to target serum levels/AUC), sometimes with a 25-30 mg/kg loading dose in seriously ill patients. Oral (for C. difficile): 125-500 mg four times daily for 10 days., though a prescriber sets the actual dose. With long-term use it can deplete magnesium, potassium, vitamin k. This profile indexes 3 sources.

What it's good for

Treatment of methicillin-resistant Staphylococcus aureus (MRSA) infections^1,3
Treatment of Clostridioides difficile (C. difficile) infection (oral)^2,1
Serious Gram-positive infections in patients allergic to beta-lactams^1,3
Endocarditis, bacteremia, bone and skin/soft tissue infections caused by susceptible Gram-positive organisms

What to watch for

Nephrotoxicity (kidney injury), particularly with high troughs/AUC or concurrent nephrotoxins
Ototoxicity (hearing loss, tinnitus), rare
Vancomycin infusion reaction (flushing/rash of upper body, historically called red man syndrome) from rapid infusion
Known hypersensitivity to vancomycin or other glycopeptides^1,2
Caution in pre-existing renal impairment (requires dose adjustment and monitoring)

The bottom line

Evidence rating strong. Most-documented uses: treatment of methicillin-resistant staphylococcus aureus (mrsa) infections, treatment of clostridioides difficile (c. difficile) infection (oral), serious gram-positive infections in patients allergic to beta-lactams. 3 sources indexed (2011–2020), with 0 interaction records on file.

The science

How it works, mechanistically.

Core mechanism

Vancomycin inhibits bacterial cell wall synthesis by binding with high affinity to the D-alanyl-D-alanine terminal of peptidoglycan precursor units. This binding sterically blocks transglycosylase and transpeptidase enzymes from incorporating these precursors into the growing cell wall, preventing cross-linking and elongation. The result is a weakened cell wall that leads to bacterial lysis and death. It is bactericidal against most Gram-positive organisms and acts at a different site than beta-lactam antibiotics, which is why it remains effective against methicillin-resistant strains.^3,1

Class

Glycopeptide antibiotic

Dosing

Dosing & protocol.

Common range

IV: 15-20 mg/kg every 8-12 hours (dosed by actual body weight and adjusted to target serum levels/AUC), sometimes with a 25-30 mg/kg loading dose in seriously ill patients. Oral (for C. difficile): 125-500 mg four times daily for 10 days.

Recommended form

Intravenous infusion for systemic infections; oral capsule or solution for C. difficile colitis

Oral vancomycin is very poorly absorbed from the gastrointestinal tract, which is intentional for treating C. difficile because it keeps the drug acting locally in the colon. Systemic infections therefore require the intravenous route. Oral dosing can be taken without regard to meals.

Depletions

What it depletes.

Nutrients this medication can lower over time, and what to replace.

Magnesium

Mild

Vancomycin nephrotoxicity, particularly with intravenous use, elevated trough concentrations, or concurrent aminoglycosides, can cause acute kidney injury and renal tubular dysfunction that promotes urinary magnesium wasting.

Replace Magnesium glycinateMonitor Serum magnesium (alongside serum creatinine and vancomycin trough levels)Onset Days to weeks during prolonged or high-trough intravenous therapy, especially with nephrotoxic co-medications.

Potassium

Mild

Vancomycin-associated acute kidney injury and renal tubular injury can impair potassium reabsorption and lead to renal potassium loss; this is largely a consequence of nephrotoxicity rather than a direct nutrient-binding effect.

Monitor Serum potassium (alongside serum creatinine and renal function)Onset Days to weeks during prolonged intravenous therapy if nephrotoxicity develops.

Vitamin K

Mild

Oral vancomycin used to treat Clostridioides difficile infection suppresses the colonic bacteria that synthesize menaquinone (vitamin K2), which can modestly reduce endogenous vitamin K availability; clinically this is most relevant in patients with poor dietary intake or on warfarin.

Monitor Prothrombin time / INR (particularly in patients on warfarin or with low dietary vitamin K intake)Onset Within one to two weeks of oral therapy in susceptible patients.

Full Vancomycin depletion and interaction guide →

Safety

Full safety detail.

Side effects

Nephrotoxicity (kidney injury), particularly with high troughs/AUC or concurrent nephrotoxins
Ototoxicity (hearing loss, tinnitus), rare
Vancomycin infusion reaction (flushing/rash of upper body, historically called red man syndrome) from rapid infusion
Phlebitis and pain at the IV site
Hypotension during rapid infusion
Drug rash with eosinophilia and systemic symptoms (DRESS) and other hypersensitivity reactions
Neutropenia or thrombocytopenia with prolonged use
Nausea and abdominal discomfort (oral)

Contraindications

Known hypersensitivity to vancomycin or other glycopeptides^1,2
Caution in pre-existing renal impairment (requires dose adjustment and monitoring)
Caution in pre-existing hearing loss
Caution with concurrent nephrotoxic or ototoxic agents such as aminoglycosides, loop diuretics, or amphotericin B¹

Sources

Sources, by evidence tier.

Numbered references. Citations throughout the page link here.

Reviews & position papers

1Therapeutic monitoring of vancomycin for serious methicillin-resistant Staphylococcus aureus infections: A revised consensus guideline and review by the ASHP, IDSA, PIDS, and SIDPPMIDRybak MJ, Le J, Lodise TP, et al. · American Journal of Health-System Pharmacy · 2020
AUC-guided dosing (target AUC/MIC of 400-600) is recommended over trough-only monitoring to optimize efficacy and minimize acute kidney injury.
2Clinical Practice Guidelines for Clostridium difficile Infection in Adults and Children: 2017 Update by the Infectious Diseases Society of America (IDSA) and Society for Healthcare Epidemiology of America (SHEA)PMIDMcDonald LC, Gerding DN, Johnson S, et al. · Clinical Infectious Diseases · 2018
Oral vancomycin (or fidaxomicin) is recommended for both initial and recurrent C. difficile infection in place of metronidazole.
3Clinical Practice Guidelines by the Infectious Diseases Society of America for the Treatment of Methicillin-Resistant Staphylococcus aureus Infections in Adults and ChildrenPMIDLiu C, Bayer A, Cosgrove SE, et al. · Clinical Infectious Diseases · 2011
Vancomycin is recommended as a primary treatment option for a range of MRSA infections, with dosing guidance and monitoring considerations.

FAQ

Common questions.

Quick answers about Vancomycin, drawn from the data on this page.

What is Vancomycin?

What is Vancomycin used for?

Commonly cited benefits of Vancomycin include: Treatment of methicillin-resistant Staphylococcus aureus (MRSA) infections; Treatment of Clostridioides difficile (C. difficile) infection (oral); Serious Gram-positive infections in patients allergic to beta-lactams; Endocarditis, bacteremia, bone and skin/soft tissue infections caused by susceptible Gram-positive organisms. NutriStack rates the overall evidence as strong.

What is a typical dose of Vancomycin?

A typical adult dose of Vancomycin is IV: 15-20 mg/kg every 8-12 hours (dosed by actual body weight and adjusted to target serum levels/AUC), sometimes with a 25-30 mg/kg loading dose in seriously ill patients. Oral (for C. difficile): 125-500 mg four times daily for 10 days.. The commonly recommended form is Intravenous infusion for systemic infections; oral capsule or solution for C. difficile colitis. These are general ranges, not personalized advice; confirm the right dose with a clinician.

What are the side effects of Vancomycin?

Reported side effects include nephrotoxicity (kidney injury), particularly with high troughs/auc or concurrent nephrotoxins, ototoxicity (hearing loss, tinnitus), rare, vancomycin infusion reaction (flushing/rash of upper body, historically called red man syndrome) from rapid infusion, phlebitis and pain at the iv site, hypotension during rapid infusion, drug rash with eosinophilia and systemic symptoms (dress) and other hypersensitivity reactions. This is educational information; check with a healthcare professional before use.

How strong is the evidence for Vancomycin?

NutriStack rates this as Strong, meaning multiple high-quality meta-analyses or systematic reviews converge on the same finding. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.

Use this with your stack

Vancomycin in NutriStack.

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