-Cure most athlete's foot between the toes in one week while providing effective relief from the itching and burning of athlete's foot. -Kills the natural fungus that causes tinea pedis in athletes and others, commonly known as athlete's foot. -Lotrimin Ultra contains prescription strength butenafine hydrochloride medicine to kill most fungus between the toes. -Help your teenage athlete with the discomfort of itchy feet due to athlete?s foot. -Fungus on your skin can lead to jock itch and ringworm, too. This prescription strength cream is formulated to treat all three conditions.