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Twelve weeks — or, in certain situations, 8 weeks — is the current standard duration of direct-acting antiviral (DAA) regimens for the treatment of chronic hepatitis C virus (HCV) infection. Shorter regimens are desirable to reduce cost and improve compliance.
In an industry-funded, single-center trial, investigators assessed the efficacy of elbasvir 100 mg (NS5A inhibitor)/grazoprevir 50 mg (NS3/4A inhibitor) and sofosbuvir 400 mg (NS5B inhibitor) for durations of 4–12 weeks in 143 treatment-naive patients with HCV genotype 1 or 3 infection. Genotype 1 treatment failures were retreated with the same regimen plus ribavirin for 12 weeks. The primary endpoint was assessment of HCV RNA <15 IU/mL at 12 weeks after treatment was completed (SVR12)…