LamisilAT Cream for Jock Itch with Terbinafine Hydrochloride solution 1% antifungal cream is proven to cure jock itch with one week of treatment*. Prescription strength LamisilAT relieves your symptoms and kills the fungus that causes jock itch. Jock itch is a contagious fungal infection that affects the skin in the groin area. It is caused by a certain kind of fungi that love warm, moist conditions. Jock Itch occurs more often in men than women. Jock itch cured in 1 week* with Lamisil AT Antifungal Relief Jock Itch Cream. *When used as directed for the treatment of athlete's foot between the toes, ringworm and jock itch. Among branded OTC jock itch products.