Comparative PK Study of Econazole Nitrate Foam and Econazole Nitrate Cream in Subjects With Interdigital Tinea Pedis Aged 12 Years to Less Than 18 Years

Inclusion Criteria: * Be between 12 years and less than 18 years of age and of either sex. * Have a clinical diagnosis of interdigital tinea pedis * Parent/guardian has provided written informed consent and the subject has provided written assent. * Be willing and able to use the assigned study medication as directed and to commit to all follow-up visits for the duration of the study. * Have microscopic evidence (positive KOH) of the presence of fungi and a positive fungal culture. * Be in good health and free of any disease or physical condition which might, in the Investigator's opinion, expose the subject to an unacceptable risk by study participation. * Females must be non-pregnant, non-lactating and not intending to become pregnant during the course of the study. Exclusion Criteria: * Is pregnant, nursing or planning a pregnancy during the study * Has used topical antifungals or topical corticosteroids on the feet within 14 days prior to the start of the study. * Has received systemic antifungal therapy within 12 weeks prior to the start of the study medication. * Has used systemic antibacterials or systemic corticosteroids within 14 days prior to the start of the study. * Has a history of uncontrolled diabetes mellitus or is immunocompromised (due to disease, e.g., HIV, or medications). * Has concurrent moccasin-type tinea pedis (in the opinion of the Investigator). * Has any other skin disease which might interfere with the evaluation of tinea pedis. * Is currently enrolled in an investigational drug or device study. * Has received an investigational drug or treatment with an investigational device within 30 days prior to entering this study. * Is unreliable, including subjects with a history of drug or alcohol abuse. * Has known hypersensitivity to any of the components of the study medications.