Drug Interaction Report

MONITOR: Coadministration with inducers of CYP450 3A4 may decrease the plasma concentrations of vonoprazan, which is metabolized by the isoenzyme. When coadministered with potent and moderate CYP450 3A4 inducers, vonoprazan systemic exposure (AUC) is predicted to decrease by 80% and 50%, respectively. No data are available for other, less potent CYP450 3A4 inducers.

MANAGEMENT: The potential for diminished pharmacologic effects of vonoprazan should be considered during coadministration with CYP450 3A4 inducers. Alternative treatments may be required if an interaction is suspected.

ADJUST DOSING INTERVAL: Food may increase the extent of tecovirimat absorption following oral administration. When the recommended oral dose of tecovirimat (600 mg every 12 hours) was administered with a meal (approximately 600 calories and 25 g of fat) in healthy adults weighing less than 120 kg, tecovirimat absorption increased by 39% relative to fasting.

MANAGEMENT: Oral tecovirimat should be taken within 30 minutes after a full meal containing moderate or high fat (approximately 600 calories and 25 g of fat) with 6 to 8 ounces of water.