- Use of Cytochrome P450 (CYP) 1A2 (CYP1A2) inhibitors (for example, fluvoxamine, enoxacin) and/or use of inhibitors of P-glycoprotein (for example, ketoconazole, erythromycin) or CYP3A4 (for example, ketoconazole, erythromycin) or their inducers (for example, rifampicin, carbamazepine, phenytoin, St John's wort) in the 28 days before the start of Screening