Amenamevir is primarily used as an antiviral medication, specifically for the treatment of herpes zoster (shingles). It works by inhibiting the replication of the varicella-zoster virus, which is responsible for causing shingles. This drug is particularly effective in reducing the duration and severity of the rash and pain associated with the condition. It is often prescribed for patients who may not tolerate other antiviral drugs well, offering an alternative treatment option. Additionally, Amenamevir is administered orally, making it convenient for patients who prefer or require a non-invasive treatment method. Its targeted action helps in managing symptoms and preventing complications such as postherpetic neuralgia, a common and painful condition that can follow a shingles outbreak.