Drugmaker Gilead Sciences Inc said U.S. Food and Drug Administration had approved the expanded use of its blockbuster hepatitis C drug, Harvoni. The drug can now be used to treat patients with subtypes of chronic hepatitis C virus (HCV) and patients who are co-infected with Human Immunodeficiency Virus (HIV), Gilead said in a statement. Gilead's Harvoni was first approved by the FDA in October 2014.

