Numerous drugs have been developed, such as interferon a and various nucleoside analogs, but the former has many side effects and drug resistance easily develops with the latter. The efficacy of treatment is not great.
目前雖然已開發出多種藥物，例如干擾素 α 及各種核 r 酸類似物，但前者副作用多，後者易有抗藥性，治療效果不佳。