Background: Sofosbuvir (SOF) is a hopeful remedy for chronic hepatitis C virus infection. However, it records some unfavorable influences on gastrointestinal tract. Fucoidan is a sulfated polysaccharide having cytoprotective effect besides anti-inflammatory and antioxidant properties.Aim: This work has been focused on the possible effect of sofosbuvir on the fundic mucosa and to assess the probabl...