Fenytoin Undersøgelser har vist, at doseringen af fenytoin (CYP2C19 og CYP2C9 substrat) måske må nedsættes ved samtidig administration af lansoprazol. ###>Phenytoin Studies have shown that the dosage of phenytoin (CYP2C19 and CYP2C9 substrate) may have to be reduced when administered concomitantly with lansoprazole.