Efficacy and safety of luliconazole 5% nail solution for the treatment of onychomycosis: A multicenter, double‐blind, randomized phase III study

Onychomycosis is a highly prevalent and intractable disease. The first-line treatment agents are oral preparations, but an effective topical medication has long been desired. The objective was to investigate the efficacy and safety of luliconazole 5% nail solution, an imidazole antifungal agent, for the treatment of patients with onychomycosis. A multicenter, double-blind, randomized phase III study was conducted in Japanese patients with distal lateral subungual onychomycosis affecting the great toenails, with 20–50% clinical involvement. Patients were randomized (2:1) to luliconazole or vehicle once daily for 48 weeks. The primary end-point was the complete cure rate (clinical cure [0% clinical involvement of the nail] plus mycological cure [negative results on direct microscopy]). The adverse event incidence was monitored to evaluate safety. The complete cure rate significantly favored luliconazole (14.9%, 29/194 subjects) versus vehicle (5.1%, 5/99) (P = 0.012). Similarly, the negative direct microscopy rate was significantly higher with luliconazole (45.4%, 79/174) than with vehicle (31.2%, 29/93) (P = 0.026). There were no serious adverse drug reactions. We conclude that once daily topical luliconazole 5% nail solution demonstrated clinical efficacy and was confirmed to be well tolerated.