Hypersensitivity to the active substance or to any of the excipients;
Moderate to severe hepatic impairment, i.e. Child-Pugh class B or C;
Baseline values of liver aminotransferases, i.e. aspartate aminotransferase (AST) and/or alanine aminotransferase (ALT), greater than 3 × the upper limit of normal (ULN);
Concomitant use of cyclosporine A;
Pregnancy;
Women of childbearing potential who are not using reliable methods of contraception.