Zostrix does not help get rid of shingles, but it can help alleviate the nerve pain, or neuralgia, that often lingers following a shingles outbreak, advises Drugs.com. Zostrix also relieves minor pain due to rheumatoid arthritis and muscle sprains and strains.
Zostrix is a brand name for the generic drug capsaicin, explains Drugs.com. Capsaicin works by reducing the body's production of substance P, which transmits pain signals to the brain, states MedicineNet.
Zostrix is available over the counter, usually as a cream. Other brands of capsaicin are available over the counter or by prescription in various forms, including creams, gels, lotions and patches, advises Drugs.com. Zostrix is for topical use only, and individuals should not apply it to injured or irritated skin.