Gilead Sciences, Inc. announced that the Japanese Ministry of Health, Labour and Welfare (MHLW) has approved Harvoni® (ledipasvir 90 mg/sofosbuvir 400 mg), the first once-daily single tablet regimen for the treatment of chronic hepatitis C genotype 1 infection in adults. Harvoni combines the NS5A inhibitor ledipasvir with the nucleotide analog polymerase inhibitor sofosbuvir, approved by the MHLW under the trade name Sovaldi® in March 2015. Harvoni is indicated for the suppression of viremia in patients with genotype 1 chronic hepatitis C virus (HCV) infection with or without compensated cirrhosis, with a treatment duration of 12 weeks.
Primarily due to HCV, Japan has one of the highest rates of liver cancer of any industrialized country. Of the more than one million people in Japan chronically infected with HCV, 70-80 percent are infected with the genotype 1 strain of the virus.
Harvoni’s approval in Japan is supported by data from 318 treatment-naïve and treatment-experienced Japanese patients with genotype 1 HCV infection randomized to ledipasvir/sofosbuvir (n=157) or ledipasvir/sofosbuvir plus ribavirin (n=161) in the Phase 3 clinical trial GS-US-337-0113. Of the 318 patients enrolled in this study, 34 percent were ages 65 years or older and 23 percent had cirrhosis.
Among patients receiving 12 weeks of ledipasvir/sofosbuvir without ribavirin, 100 percent (n=78/78) of treatment-naïve and 100 percent (n=79/79) of treatment-experienced patients achieved sustained virologic response 12 weeks after completing therapy (SVR12). Adverse events observed with ledipasvir/sofosbuvir without ribavirin were generally mild and included nasopharyngitis (29 percent), headache (7 percent) and malaise (6 percent).
