Terbinafine is widely used as an antifungal agent, particularly in the treatment of dermatophytosis such as athlete’s foot, jock itch, and ringworm. It is effective in treating fungal infections of the nails (onychomycosis), where it helps clear the infection by inhibiting fungal cell membrane synthesis. Due to its fungicidal action, it provides long-lasting effects even after treatment ends. It is available in topical forms like creams, gels, and sprays for skin infections, and as oral tablets for more severe or widespread infections. Its high affinity for keratin-rich tissues like skin, hair, and nails makes it especially suitable for treating infections in these areas.