A variety of treatments for fungal infections have been developed over the years, some of which are systemic and others that are normally utilized topically. One of the most popular topical antifungal agents is miconazole, which is available in both over-the-counter and prescription strengths under a variety of trade names, including Micatin and Monistat. Among the conditions that are commonly treated with miconazole are ringworm, athlete’s foot, tinea versicolor, jock itch, and yeast infections. Though generally considered a safe and effective treatment, burning, itching, irritation, and other mild side effects sometimes accompany miconazole use. Also, recent evidence indicates that some miconazole-containing products react adversely with the blood thinning drug warfarin, leading to more serious side effects, including nosebleeds, bleeding of the gums, and bruising.