Drug Interactions between calcium phosphate, tribasic / ginger and lusutrombopag

MONITOR: Coadministration with inhibitors of P-glycoprotein (P-gp) and/or breast cancer resistance protein (BCRP) may increase the plasma concentrations of lusutrombopag, which is a substrate of both efflux transporter proteins. Coadministration with cyclosporine, a P-gp and BCRP dual inhibitor, increased lusutrombopag peak plasma concentration (Cmax) and systemic exposure (AUC) by approximately 20% each compared with lusutrombopag administration alone.

MANAGEMENT: Caution is advised if lusutrombopag is prescribed in combination with P-gp and/or BCRP inhibitors. Pharmacologic response to lusutrombopag should be monitored more closely following initiation, discontinuation, or change of dosage of the concomitant P-gp or BCRP inhibitor.