Not to be given as monotherapy. Severe bradycardia & heart block. Patients w/ genotype 4 & 6 HCV infection; HBV/HCV co-infection; prior exposure to NS5A inhibitor. Perform HBV screening prior to treatment. Concomitant use w/ amiodarone. Galactose intolerance, Lapp lactase deficiency or glucose-galactose malabsorption. May affect ability to drive & use machines. Women of childbearing potential should use effective contraception for 5 wk after completion of therapy. Not to be used during pregnancy & lactation. Not recommended in childn & adolescents <18 yr.
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