Onychomycosis Treatment Guidelines

Systemic Treatment Options

The American Academy of Dermatology recommends Terbinafine as the first-line oral treatment for onychomycosis due to its superior efficacy, fungicidal properties, and favorable cost-effectiveness profile 1
Terbinafine works by inhibiting squalene epoxidase, depleting ergosterol and accumulating squalene, which is directly fungicidal against dermatophytes 1
Itraconazole is an effective alternative, administered as 200 mg twice daily for 1 week per month (pulse therapy), with two pulses for fingernails and three for toenails 1
Griseofulvin is now considered a third-line agent due to poor cure rates (30-40%), high relapse rates, and lengthy treatment duration (6-18 months) 2

The British Association of Dermatologists recommends topical therapy should only be used for superficial white onychomycosis (SWO), very early distal lateral subungual onychomycosis (DLSO), or when systemic therapy is contraindicated 3
Amorolfine 5% nail lacquer is effective in approximately 50% of cases when infection is limited to the distal portion of the nail 3

The American Diabetes Association recommends Terbinafine as the preferred treatment for diabetic patients due to lower risk of drug interactions and hypoglycemia 4
Onychomycosis is a significant predictor for foot ulcers in diabetics, making treatment particularly important in this population 4
The British Association of Dermatologists recommends Terbinafine and fluconazole as preferred treatments for immunosuppressed patients due to lower risk of interactions with antiretrovirals 4

The American Academy of Pediatrics recommends pulse itraconazole therapy (5 mg/kg/day for 1 week every month) for 2 months for fingernail infection and 3 months for toenail infection 5
Terbinafine is recommended for children based on weight: 62.5 mg/day if <20 kg, 125 mg/day for 20-40 kg, and 250 mg/day if >40 kg 5

Photodynamic therapy has shown cure rates of 44.3% at 12 months, but evidence remains limited 6

Onychomycosis has high recurrence rates (40-70%), necessitating preventive strategies 6
Prevention includes wearing protective footwear in public facilities, using absorbent and antifungal powders in shoes, keeping nails short, and avoiding sharing nail clippers 6