Loceryl Curanail 5% Medicated Nail Lacquer Loceryl Curanail 5% Medicated Nail Lacquer is a once weekly, prescription strength treatment for fungal nail infections. Curanail is suitable for mild fungal nail infections (i.e. the upper half or sides of the nail are affected), & can be used for up to two nails. Loceryl Curanail 5% Nail Lacquer contains a powerful agent called amorolfine, which is clinically proven to kill a variety of fungi. Amorolfine works by stopping the production of ergosterol, an essential component of the fungal cell membrane. Without ergosterol, the cell membrane breaks down & the fungi are destroyed. Each pack contains 3ml of nail lacquer (approximately a 3 month supply), together with re-usable applicators.