KETOCONAZOLE & OTHER CYP3A4 INHIBITORS MAY INCREASE SERUM CONC OF NETUPITANT. RIFAMPICIN, A STRONG CYP3A4 INDUCER DECREASES SERUM CONC OF NETUPITANT. ERYTHROMYCIN, DOCETAXEL, ETOPOSIDE & MIDAZOLAM WHEN ADMINISTERED WITH NETUPITANT HAS INCREASED BIOAVAILABILITY.