FOSTER CITY, Calif.--(BUSINESS WIRE)--Gilead Sciences, Inc. (Nasdaq: GILD) today announced that, in consultation with the U.S. Food and Drug Administration (FDA), the company will amend the design of ongoing clinical trials to discontinue dosing of GS 9190 in hepatitis C-infected patients who are receiving that compound in combination with pegylated interferon and ribavirin, and another direct-acting antiviral agent.