What is the appropriate management for a wound caused by a xylazine injection?

Management of Xylazine-Associated Wounds

Xylazine-associated wounds should be managed conservatively with nonadherent and absorptive dressings plus antimicrobial ointment, while avoiding aggressive surgical debridement that increases the risk of tendon exposure, osteomyelitis, and amputation. 1

Wound Characteristics and Recognition

Xylazine wounds present distinctly from typical injection drug use complications:

• These wounds begin as small round ulcerations that coalesce and deepen, progressing to larger necrotic wounds with a characteristic "Swiss cheese" pattern of tissue loss surrounded by viable tissue. 2, 1

• Wounds occur both at injection sites and remote from injection sites, most commonly on extensor surfaces of extremities. 2, 3

• They can develop following intravenous, intranasal, or inhalational use—not just injection. 2

• The pathophysiology involves direct cytotoxicity and peripheral vasoconstriction, not venous insufficiency. 2, 1

• Approximately 60% of wounds have predominantly devitalized tissue (eschar or slough) in the wound bed. 3

• Deep space infections with exposed bone or tendon occur in approximately 9% of cases. 3

Evidence-Based Outpatient Wound Care Protocol

The cornerstone of management is conservative wound care that can be delivered in low-barrier clinic settings:

Initial Assessment

• Measure wound dimensions and depth to detect bone involvement. 1
• Assess for the characteristic "Swiss cheese" pattern indicating deep space or necrotizing infection. 2, 1
• Determine if hospitalization is needed based on suspected deep infection or systemic signs. 2, 1

Standard Wound Care Technique

• Cleanse with sterile normal saline. 1
• Perform conservative debridement only—remove only clearly necrotic tissue without excising viable tissue margins. 2, 1
• Apply antimicrobial ointment directly to the wound bed. 2, 1
• Place a nonadherent primary dressing to prevent trauma during changes. 2, 1
• Apply an absorptive secondary layer to manage heavy exudate while maintaining a moist wound environment. 2, 1

Follow-Up Schedule

• Monitor every 2-5 days initially. 1
• Re-evaluate at 2 weeks. 1
• Document wound size, drainage quality/quantity, and surrounding tissue viability at each visit. 1

Critical Management Principles: What NOT to Do

Avoid Compression Therapy

Never apply Unna boots (zinc oxide compression bandages) or other compression therapy to xylazine wounds. 1 The American College of Emergency Physicians specifically recommends against this because:

• The underlying pathophysiology is cytotoxicity and vasoconstriction, not venous insufficiency. 2, 1
• Compression can worsen tissue ischemia in an already compromised vascular bed. 1

Avoid Aggressive Surgical Debridement

Aggressive surgical debridement impairs healing and leads to worse outcomes. 2, 1 Specifically:

• It exposes healthy tendons and bone unnecessarily. 2, 1
• It increases the risk of chronic osteomyelitis. 2, 1
• It significantly increases amputation risk. 2, 1
• Conservative debridement that removes only clearly necrotic tissue is preferred. 2, 1

Delay Definitive Closure

• Do not close wounds prematurely. 1
• Split-thickness skin grafts should be delayed until patients are stabilized in substance use treatment. 1
• Infected wounds must never be closed. 1

Hospital Management for Complex Wounds

Hospitalization is indicated when:

• Deep space or necrotizing infection is known or suspected. 2
• Systemic signs of infection are present. 2
• Bone involvement requires evaluation. 1

Even in hospital settings, the same conservative wound care principles apply—topical wound care should proceed while avoiding aggressive debridement. 2

Surgical Staging and Intervention (When Conservative Care Fails)

When wounds progress despite optimal conservative management, a staged approach based on depth of involvement is appropriate:

• Stage 1 (superficial ulceration involving skin and subcutaneous tissue): Local wound care only. 4
• Stage 2 (deeper ulceration involving tendons and/or muscle): Surgical debridement and soft-tissue reconstruction. 4
• Stage 3 (ulceration involving bone): Osseous debridement and reconstruction. 4
• Stage 4 (all tissues in extremity involved): Amputation is often necessary. 4

However, surgical complications occur in 59% of operatively managed patients, primarily due to continued wound issues, infections, and graft failures. 5

Special Considerations for This Population

Barriers to Healing

• These wounds heal slowly over weeks to months, requiring sustained engagement. 2, 1
• Patients face difficulty accessing scheduled medical care and wound care supplies, especially if unhoused. 2, 1
• Approximately 49% of hospitalized patients leave against medical advice. 5
• Among surgical patients, 64% leave against medical advice during the postoperative period. 5
• Continued drug use occurs in 68% of surgical patients per hospital records. 5

Optimizing Outcomes

• Optimize medication for opioid use disorder to decrease injection frequency and reduce exposure to xylazine-contaminated drug supply. 1
• Provide wound care in low-barrier clinic settings where patients are more likely to engage. 2, 1
• Address barriers including homelessness (present in 40% of patients), psychiatric diagnoses (26%), and hepatitis C (67%). 5

Antibiotic Use

Wounds do not always warrant antibiotics—wound care can be effectively performed outside hospital settings without systemic antimicrobials. 2 Reserve antibiotics for:

• Wounds with confirmed superficial or deep infections. 2
• Systemic signs of infection. 2
• Deep space involvement. 2

Expected Timeline and Prognosis

• Wounds typically heal over weeks to months with consistent conservative care. 2, 1
• The mortality rate is 0% in hospitalized patients. 5
• Subacute (1-3 months) and chronic wounds (≥3 months) are more likely to be medium or large in size and have devitalized wound beds. 3
• Secondary infection risk is generally low but appears more common among unhoused populations. 6