Diabetic Foot Care Medication

Why diabetes targets the feet

Two mechanisms do the damage. Peripheral neuropathy (nerve damage caused by sustained high blood sugar) dulls sensation in the toes and soles. A blister, stone in the shoe or small cut goes unnoticed. Meanwhile peripheral arterial disease reduces blood flow, slowing healing and weakening the immune response at the wound site.

The result is a dangerous feedback loop. An injury you cannot feel, in tissue that heals slowly, in an environment (a warm, moist shoe) that bacteria love. This is why even a minor wound on a diabetic foot demands attention that would be unnecessary in a non-diabetic patient.

Glucose control: the foundation

Metformin remains the first-line oral medication for type 2 diabetes. By reducing hepatic glucose output and improving insulin sensitivity, it keeps HbA1c levels down, and sustained HbA1c below 53 mmol/mol (7.0%) significantly slows the progression of peripheral neuropathy. UKPDS trial data demonstrated a 25% reduction in microvascular complications with intensive glucose control.

Metformin is well tolerated by most patients. Gastrointestinal side effects (nausea, loose stools) are common early on but usually settle within a few weeks. Modified-release formulations cause fewer gut symptoms. Your GP will monitor kidney function annually. Dose adjustment is needed if eGFR drops below 45.

What helps with neuropathy pain?

Burning, tingling or shooting pains in the feet (particularly at night) point to painful diabetic neuropathy. Standard painkillers do little. NICE recommends starting with either amitriptyline (10-75 mg at night), duloxetine (60-120 mg daily) or gabapentin (titrated to 1800 mg daily in divided doses) as first-line options.

Gabapentin is the one we hear asked about most. It works by modulating calcium channels in the spinal cord, dampening the overactive pain signals that damaged nerves produce. Common side effects include drowsiness, dizziness and peripheral oedema. Most patients start at 300 mg once daily and increase weekly until pain relief is adequate or side effects limit the dose.

Pregabalin (150-600 mg daily) is a close relative with slightly faster onset. It is often tried when gabapentin is not tolerated. Capsaicin 0.075% cream, applied to the feet four times daily, offers a topical option (it depletes substance P from sensory nerve endings) but the burning sensation during the first two weeks puts many patients off.

These are examples of typical regimens. Your GP or diabetes team will determine the appropriate medication based on your pain profile, kidney function and other prescriptions.

Wound care and infection management

Any open wound on a diabetic foot needs proper assessment. Podiatrists classify ulcers using the Wagner or University of Texas systems, which guide treatment intensity. A superficial ulcer may only need offloading (special footwear or a removable cast) and regular dressings. A deep or infected ulcer often requires antibiotics, vascular review and sometimes surgical debridement.

Empirical antibiotic choice for a mildly infected diabetic foot ulcer typically starts with co-amoxiclav or flucloxacillin plus metronidazole to cover the broad mix of organisms involved. Wound swabs help refine the prescription. Moderate to severe infections warrant hospital admission and intravenous antibiotics. Do not wait to see if oral tablets work.

The daily foot check

Five minutes a day. Look at the tops, soles, heels and between every toe. Use a mirror or ask a partner to help if bending is difficult. You are looking for cuts, blisters, redness, swelling, colour changes, cracks in the skin or any area that feels warmer than its surroundings.

Wash feet in lukewarm water. Test with your elbow, not your toes, since neuropathy can mask scalding. Dry thoroughly between the toes. Apply a plain emollient (E45, Cetraben, Doublebase) to prevent cracking but avoid moisturising between the toes where dampness promotes fungal growth. Never use corn plasters, razor blades or medicated pads. These can cause chemical burns or cuts that escalate rapidly.

Footwear and orthotics

Shoes should have a wide toe box, a firm heel counter and no internal seams that could rub. Many patients qualify for NHS-funded therapeutic footwear through their diabetes foot clinic. Here at the Achilles Centre we provide orthotic assessment and fitting. Properly moulded insoles redistribute pressure away from vulnerable areas and reduce ulcer recurrence by up to 50% according to data from the International Working Group on the Diabetic Foot.

Red flags: when to act fast

Call your GP or diabetes foot team immediately if you notice a new wound that is not healing after 48 hours, spreading redness around a wound, any discharge or unusual smell, sudden colour change in a toe (white, blue or black), or fever alongside a foot wound. These can progress to limb-threatening infection within hours. Out of hours, attend A&E rather than waiting for a morning appointment.

Speak to your GP or diabetes foot team about medication options, or contact our clinic (/services/podiatry/) for a diabetic foot assessment.

Further reading

If a foot wound shows signs of infection, see our guide to antibiotics for foot infections (/health-info/antibiotics-foot-infection/) for treatment options.

Corns and calluses need careful handling in diabetic feet. Our corn and callus removal page (/health-info/corn-callus-removal/) explains why.

For diabetic foot screening appointments, contact our podiatry clinic (/services/podiatry/).

Disclaimer

This information is for educational purposes only and does not replace individual medical advice. Always consult your podiatrist, GP or diabetes team before changing medication. Diabetic foot complications require coordinated multidisciplinary care. Do not self-manage suspected infections.