What topical medications are used for tinea unguium (onychomycosis)?

Common topical medications for onychomycosis include amorolfine nail lacquer, ciclopirox nail lacquer, ciclopirox cream, terbinafine cream, and bifonazole cream. Topical treatments are suitable for mild cases of onychomycosis; however, their efficacy is limited in cases with severe nail thickening. If nail lesions persist long-term, prompt medical consultation is advised.

1. Amorolfine nail lacquer: A nail lacquer specifically formulated for onychomycosis, it penetrates the nail plate to inhibit fungal growth and reproduction. Prior to application, gently file the surface of the affected nail to enhance drug penetration, and apply consistently according to the prescribed regimen. Because nails grow slowly, prolonged, continuous use is required—do not discontinue treatment prematurely due to lack of immediate visible improvement.

2. Ciclopirox nail lacquer: This lacquer acts directly on the nail plate and inhibits a broad spectrum of pathogenic fungi, making it appropriate for mild onychomycosis. Before application, file the affected nail and remove superficial debris to improve drug absorption. Apply carefully, avoiding contact with surrounding healthy skin. Some individuals may experience mild local skin irritation; if discomfort occurs, discontinue use immediately.

3. Ciclopirox cream: The cream formulation is particularly suitable when onychomycosis coexists with adjacent dermatophytosis (e.g., tinea of the perionychial skin). It should be applied both to the periungual skin and the nail surface. Although its ability to penetrate the nail plate is weaker than that of nail lacquers, it is primarily used to treat fungal infection around the nail fold. Keep the affected area clean and dry to minimize moisture-related recurrence of fungal infection.

4. Terbinafine cream: This agent inhibits fungal cell membrane synthesis and effectively eradicates superficial dermatophytes. It is commonly used for onychomycosis accompanied by tinea manuum or tinea pedis. Due to poor penetration through thickened nail plates, terbinafine cream is typically employed as an adjunctive therapy rather than monotherapy. Apply daily, maintain thorough hand and foot hygiene, and frequently change and wash socks and footwear to prevent recurrent or cross-infection.

5. Bifonazole cream: This antifungal exhibits prolonged activity and helps manage fungal infection of the periungual skin, thereby supporting comprehensive onychomycosis treatment. Its nail plate penetration is limited, so it is not recommended as primary therapy for severe onychomycosis. During treatment, keep hands and feet dry; excessive moisture diminishes the drug’s clinical effectiveness.

In daily life, maintain dryness and ventilation of the hands and feet, change socks and shoes regularly, avoid sharing slippers or nail clippers, routinely file affected nails, and strictly adhere to the full prescribed treatment course to reduce the risk of onychomycosis recurrence.