There are medications to control Hep-C, however they don't work for 1/2 of patients.
"Antiviral medicines also are used to treat long-term (chronic) hepatitis C. These medicines can help prevent the hepatitis C virus from damaging your liver.
Sometimes treatment doesn't permanently lower the amount of virus in your blood. But some studies have shown that treatment may still reduce scarring in your liver, which can lower your chances of developing cirrhosis and liver cancer.6, 1
Interferons combined with ribavirin are used to help your body get rid of the virus. These medicines may be combined with a protease inhibitor (such as boceprevir or telaprevir) to treat long-term (chronic) hepatitis C."
Full article is in link from Webmd http://www.webmd.com/hepatitis/hepc-guide/hepatitis-c-medications