Foot ulcers and skin infections are serious complications that can arise from the use of certain medications. For patients with underlying conditions such as diabetes, peripheral artery disease, or chronic kidney disease, the risk is even higher. Studies show that approximately 15-25% of individuals with diabetes will develop a foot ulcer during their lifetime, and medication-related side effects can significantly accelerate that process. Medications may impair circulation, reduce sensation, thin the skin, or suppress the immune system, creating the perfect environment for wounds that fail to heal. Early intervention and proactive prevention are essential to avoid infection, hospitalization, or amputation. This article provides an evidence-based guide to understanding, preventing, and managing medication-related foot ulcers and skin infections.

Understanding How Medications Contribute to Foot Ulcers and Skin Infections

The mechanism by which medications predispose patients to foot problems is multifaceted. Some drugs directly damage skin integrity, while others compromise the body’s ability to detect injury or fight infection. The most common pathways include:

  • Reduced circulation: Drugs that cause vasoconstriction or increase blood viscosity (e.g., beta-blockers, certain decongestants, erythropoietin) can reduce blood flow to the feet, depriving tissues of oxygen and nutrients needed for healing.
  • Neuropathy and loss of protective sensation: Chemotherapy agents (especially platinum-based drugs and taxanes), antiretroviral medications, and some anticonvulsants can cause peripheral neuropathy. Patients may not feel a minor cut, blister, or pressure point, allowing it to progress into an ulcer.
  • Thinning and fragility of skin: Chronic use of corticosteroids—either systemic or topical—leads to dermal atrophy, making the skin more prone to tearing. Anticoagulants (warfarin, apixaban, rivaroxaban) can cause easy bruising and bleeding under the skin, which may break down and form ulcers.
  • Immune suppression: Immunosuppressants used for organ transplantation, autoimmune diseases, or cancer treatment (e.g., methotrexate, cyclosporine, biologics) impair the body’s ability to fight infection. A small non-healing wound quickly becomes a reservoir for bacteria.
  • Altered metabolism and glycemic control: Certain medications worsen glycemic control (corticosteroids, some antipsychotics, diuretics), leading to hyperglycemia, which impairs wound healing and increases infection risk.

High-Risk Medication Classes

While any medication can theoretically contribute to foot ulcers, the following classes deserve special attention:

  • Corticosteroids (prednisone, hydrocortisone, dexamethasone) – cause skin thinning, delayed wound healing, and immune suppression. Long-term use is particularly dangerous.
  • Chemotherapy agents – taxanes (paclitaxel, docetaxel), platinum compounds (cisplatin, oxaliplatin), and bortezomib are strongly linked to peripheral neuropathy and skin toxicity.
  • Oral anticoagulants and antiplatelet drugs – warfarin, rivaroxaban, aspirin, clopidogrel – increase the risk of subcutaneous bleeding and hematoma formation, which can necrose and become infected.
  • Immunosuppressants – methotrexate, azathioprine, cyclosporine, TNF-alpha inhibitors – blunt the inflammatory response, making infections harder to detect and treat.
  • Diuretics – loop diuretics (furosemide, torsemide) and thiazides can cause electrolyte imbalances and dehydration, leading to fragile skin and impaired circulation.
  • Antipsychotics and antidepressants – some (e.g., olanzapine, quetiapine) cause weight gain and worsen metabolic syndrome, while SSRIs can increase bleeding risk when combined with anticoagulants.

Patients taking any of these medications—especially in combination with diabetes, vascular disease, or a history of foot ulcers—should be monitored closely by their healthcare team.

Prevention Strategies: A Multilayered Approach

Preventing medication-related foot ulcers requires proactive coordination between the patient, primary care provider, podiatrist, wound care specialist, and pharmacist. The following strategies are based on current clinical guidelines from the American Diabetes Association and the Wound Healing Society.

Daily Foot Self-Examination

Every patient at risk should perform a thorough foot inspection every day. Use a mirror to check the soles, heels, and between toes. Look for:

  • Cuts, blisters, calluses, or red spots
  • Swelling, warmth, or discoloration
  • Bruises (especially in patients on anticoagulants)
  • Dry or cracking skin
  • Ingrown toenails or fungal infections

If you have difficulty bending to see your feet, ask a caregiver for help. Any new finding should be reported to a clinician within 24 hours. A simple “foot check” sticker on the bathroom mirror can serve as a daily reminder.

Proper Hydration and Skin Care

Medications that cause dry skin (diuretics, antihistamines, isotretinoin) require aggressive moisturization. Use a thick emollient without fragrance, applied to the tops and bottoms of the feet after bathing. Do not apply moisturizer between the toes, as excess moisture can promote fungal infections. For very dry or cracked heels, apply a product containing urea or lactic acid, but avoid open wounds. Patients on anticoagulants should use a soft towel and pat dry rather than rub, to prevent bruising.

Footwear and Offloading

Shoes are the first line of defense against pressure ulcers. Wear comfortable, well-cushioned shoes with a wide toe box and a firm heel counter. Avoid flip-flops, sandals, and shoes with seams that rub. Break in new shoes gradually. For patients with existing deformities (Charcot foot, hammer toes), custom-made orthotics or diabetic shoes are recommended. Never walk barefoot, even indoors, because the loss of protective sensation makes it impossible to feel small injuries. Socks should be seamless, moisture-wicking, and change daily.

Nutritional Support for Wound Healing

Adequate protein intake is critical for tissue repair. Patients should target 1.2-1.5 grams of protein per kilogram of body weight per day. Vitamin C (in collagen synthesis), zinc (immune function), and vitamin D (bone health and immune modulation) also play roles. Supplementation may be indicated if dietary intake is insufficient. Individuals with diabetes should maintain strict glycemic control, as hemoglobin A1c levels above 7% significantly impair healing. Referral to a dietitian can help create an individualized meal plan.

Smoking Cessation and Vascular Health

Smoking further reduces peripheral circulation and is a major risk factor for non-healing ulcers. Every patient using vasoactive medications should be offered smoking cessation resources. Additionally, managing blood pressure and cholesterol levels with medication or lifestyle changes can improve perfusion to the lower extremities. For patients with known peripheral artery disease (PAD), consider referral to a vascular specialist for ankle-brachial index (ABI) testing and possible revascularization.

Medication Review and Deprescribing

The single most effective prevention strategy is a comprehensive medication review. The prescribing clinician should evaluate every drug for its potential to harm the feet. Common interventions include:

  • Switching from a high-risk corticosteroid to a non-steroidal immunosuppressant or biologic, when possible
  • Using the lowest effective dose of steroids, with a plan for taper
  • Choosing anticoagulants with a lower risk of bleeding complications (e.g., apixaban may have a better safety profile than warfarin in some patients)
  • Adding prophylactic moisturizers and neuropathy screening for patients starting chemotherapy or antiretrovirals
  • Using topical rather than systemic medicated treatments for dermatological conditions

A clinical pharmacist can perform an annual medication review to identify deprescribing opportunities and potential drug-drug or drug-disease interactions.

Managing Existing Foot Ulcers and Skin Infections

Despite the best prevention efforts, ulcers may still develop. Prompt, systematic management can prevent progression to deep infection, osteomyelitis, or amputation.

Recognizing the Early Signs of Infection

Because many patients lack sensation, they may not notice pain. Look for these warning signs:

  • Redness or spreading warmth around a wound
  • Swelling that does not go down with elevation
  • Pus or foul odor
  • Fever or chills
  • Sudden increase in blood sugar levels (for diabetics)
  • Black, necrotic tissue (eschar) surrounding the wound

If any of these signs appear, seek evaluation within 24 hours. Delays of more than 48 hours are associated with worse outcomes.

Immediate Self-Care Steps

While waiting for medical attention, the patient can take these steps:

  1. Clean the wound gently with normal saline or clean water. Do not use hydrogen peroxide or alcohol, as these damage healthy tissue.
  2. Apply a sterile, non-stick dressing to protect the wound. Change dressings at least once daily or whenever they become wet or soiled.
  3. Offloading: Strictly avoid bearing weight on the affected foot. Use crutches, a wheelchair, or a walking boot as recommended. For plantar ulcers, a total contact cast or removable cast walker is the gold standard.
  4. Keep the wound dry and covered – do not soak in baths or hot tubs.
  5. Monitor body temperature and blood glucose levels more frequently.

Professional Medical Treatment

A wound care specialist will perform a thorough assessment, including probing the wound depth, checking for sinus tracts, and evaluating vascular status. Treatment modalities include:

  • Debridement: Removal of dead, devitalized tissue and biofilm. This can be done surgically, enzymatically, or with autolytic dressings. Sharp debridement is the most effective for infected wounds.
  • Advanced wound dressings: Depending on wound exudate level and infection, clinicians may use alginates (for heavy drainage), hydrocolloids (light to moderate), foams, or antimicrobial dressings with silver or iodine.
  • Antibiotic therapy: If infection is present, culture-based systemic antibiotics are necessary. For superficial infections, oral antibiotics such as amoxicillin-clavulanate or clindamycin are common. Deep infections or osteomyelitis may require IV therapy and hospitalization.
  • Negative pressure wound therapy (NPWT): For large, non-healing wounds, NPWT promotes granulation tissue by applying controlled suction. This is often used in hospital or home health settings.
  • Hyperbaric oxygen therapy (HBOT): For refractory ulcers in patients with diabetes or PAD, HBOT increases oxygen tension in ischemic tissue and enhances healing. It is typically used as an adjunct to standard care.
  • Growth factors and skin substitutes: Platelet-derived growth factor (becaplermin) or bioengineered skin equivalents (Apligraf, Dermagraft) can accelerate closure of chronic ulcers.

While treating the wound, the medication regimen must be reassessed. For example:

  • If corticosteroids are contributing to poor healing, the dose should be minimized or alternative treatments explored.
  • Anticoagulants should be continued cautiously if the patient is at high thrombotic risk; however, the wound care team must be aware of bleeding risk during debridement.
  • Immunosuppressant dosages may be lowered if infection cannot be controlled with antibiotics alone.

Communication between the wound care provider and the prescribing physician is paramount. A coordinated team approach improves outcomes.

Special Populations and Additional Considerations

Patients with Diabetes

Diabetes is the leading cause of non-traumatic lower limb amputations, largely due to foot ulcers. In this population, medication-related risks are amplified. The combination of neuropathy, poor circulation, and hyperglycemia creates a “perfect storm.” Prevention must include tight glycemic control, comprehensive annual foot exams (including monofilament testing and ABI), and education. The American Diabetes Association recommends that a podiatrist evaluate at-risk patients at least once per year. Learn more about diabetic foot care from the American Diabetes Association.

Patients on Anticoagulants

Bleeding under the skin can mimic an ulcer or cause a hematoma that breaks down. Patients on warfarin or DOACs should be monitored for unexplained bruises on the feet. If a wound develops, apply firm pressure for 10-15 minutes to control bleeding, then protect with a non-adherent dressing. Avoid NSAIDs (ibuprofen, naproxen) for pain, as they increase bleeding risk. The CDC provides resources on safely taking anticoagulants.

Older Adults

Age-related changes in skin, reduced mobility, and polypharmacy place older adults at high risk. A geriatric assessment often reveals that medications are a modifiable risk factor. Simplify regimens when possible, and involve caregivers in daily foot checks. Fall prevention is also critical because a fall can cause a foot injury that progresses to an ulcer.

Patients with Peripheral Artery Disease

For patients with PAD, blood flow is already restricted. Adding a vasoconstrictive medication (e.g., beta-blockers, ergotamine) can tip the balance toward critical limb ischemia. These patients require a vascular consultation and may benefit from antiplatelet therapy and statins. Mayo Clinic discusses PAD management in depth.

Patient Education and Empowerment

Education is the cornerstone of prevention. Patients should understand that even a small blister can become infected when sensation is absent. Teach-back methods help confirm understanding. Provide written handouts or links to reliable online resources, such as the CDC's Diabetic Foot page. Key educational points include:

  • The importance of not walking barefoot
  • How to perform a daily foot inspection (with a demonstration)
  • Signs of infection that require immediate medical attention
  • When to call the doctor (for any new wound that does not heal in 24-48 hours)
  • Safe methods for trimming nails (straight across, file edges)

Conclusion: A Call for Integrated Care

Medication-related foot ulcers and skin infections are preventable and manageable when a comprehensive, multidisciplinary approach is adopted. Healthcare professionals—including primary care physicians, podiatrists, pharmacists, wound care nurses, and dietitians—must work together to identify high-risk patients, deprescribe harmful medications when possible, and implement robust prevention strategies. For patients already suffering from a wound, early recognition, proper wound care, and timely treatment can save limbs and lives. By empowering patients with knowledge and practical self-care skills, we can significantly reduce the burden of these devastating complications. Ultimately, the goal is not just to heal wounds, but to prevent them from occurring in the first place.