How often should permethrin be applied to effectively treat scabies?

Permethrin is an effective topical treatment for scabies that typically requires a single application to achieve optimal results. The medication works by paralyzing and killing the mites and their eggs once it is spread thoroughly over the skin. After the application, it is usually recommended to leave the permethrin cream on for about 8-14 hours, after which it can be washed off. This single treatment is usually sufficient if it is applied properly and fully covers all affected areas, including the fingers, toes, and any other parts of the body that may come into contact with the mites.

When considering the frequency of application, it's important to note that excessive or frequent reapplication is generally not necessary and may increase the risk of skin irritation without enhancing efficacy. In cases where symptoms persist or if there is a reinfestation, a healthcare provider may recommend additional treatments, but typically only after assessing the situation. Therefore, a single application is regarded as the standard approach for treating scabies with permethrin.