A hemi-sulfate salt of the structure:to treat a host infected with hepatitis C wherein the host has cirrhosis of the liver caused by hepatitis C, as well as pharmaceutical compositions and dosage forms thereof.本發明係關於一種半硫酸鹽,其具有以下結構:用於治療感染有C型肝炎之宿主,其中該宿主具有由C型肝炎引起之肝硬化;以及其醫藥組合物及劑型。