Indications and usage:vosevi is a prescription medicine used to treat adults with chronic (lasting a long time) hepatitis c (hep c) genotype 1, 2, 3, 4, 5, or 6 infection with or without cirrhosis (compensated) who have previously been treated with a hep c regimen containing an ns5a inhibitor.with vosevi, treatment is one pill, once a day, taken with food for 12 weeks.