MyHep (Sofosbuvir) 400mg tablet works by preventing the HCV virus from multiplying in your body. It helps control the infection and makes the immune system work better. This lowers your chances of getting complications and improves your quality of life. This medicine is always taken in combination with other antiretroviral medicines. It is not a cure and should neither be used to prevent HCV infection. It is important that you take this medicine as prescribed, following the dosage recommended by your doctor. Taking all doses in the right amount at the right times greatly increases the effectiveness of the medicine.