Ribavirin (RBV) could drop out of hepatitis C virus (HCV) therapy for genotype 1 (GT1) patients, as a result of Gilead Sciences Inc.’s triumph in the Phase III program known as ION, which tested the once-daily, fixed-dose combination of its approved nucleotide analog polymerase inhibitor Sovaldi (sofosbuvir) and the NS5A inhibitor ledipasvir, with and without RBV.