Drug Interaction Report

MONITOR: Coadministration with pitolisant may reduce plasma concentrations of substrates of CYP450 2C, P-glycoprotein (P-gp), and uridine diphosphate glucuronosyltransferases (UGTs). Based on in vitro data, pitolisant and its main metabolites may induce CYP450 2C, P-gp, and UGTs. Clinical data are not available.

MANAGEMENT: Caution is recommended if pitolisant is used in combination with substrates of CYP450 2C, P-gp, and/or UGTs. Clinical and laboratory monitoring may be appropriate for some drugs whenever pitolisant is added to or withdrawn from therapy.

Food prolongs the gastrointestinal absorption of selexipag. When taken with food, the time to peak concentration (Tmax) was delayed and peak plasma concentration (Cmax) was approximately 30% lower. Selexipag systemic exposure (AUC) and that of its active metabolite did not significantly change, however. Selexipag may be taken with or without food. Tolerability may be improved when taken with food.