Hydrogen peroxide is not a proven remedy for ringworm. However, antifungal ointments and creams are effective, according to WebMD. If symptoms do not begin to fade after two weeks of using an over-the-counter cream, a doctor may prescribe a stronger topical medication or an antifungal pill.
When applying the ointment, spread it beyond just the affected area to help prevent the ringworm from spreading. Closely follow package directions, and do not stop using the cream just because the symptoms fade, advises WebMD. Treatment should continue for two to four weeks to prevent the ringworm from flaring up again. For prescription medications, complete the course of treatment as advised by the physician.
Common active ingredients contained in both prescription and non-prescription-strength antifungal medications include allylamines, azoles and tolnaftate, notes WebMD. Prescription antifungal creams may contain clotrimazole and betamethasone, which combat itching, burning and inflammation. Griseofulvin is an antifungal medication that comes in pill form and is available only by prescription.