Drug Interaction Report

Consumer information for this interaction is not currently available.

MONITOR: Coadministration with inducers of CYP450 3A4 may decrease the plasma concentrations of suvorexant, which is primarily metabolized by the isoenzyme. According to the product labeling, suvorexant peak plasma concentration (Cmax) and systemic exposure (AUC) decreased by approximately 70% and 90%, respectively, when coadministered with the potent CYP450 3A4 inducer rifampin (600 mg). No data are available for use with other, less potent inducers.

MANAGEMENT: The potential for diminished therapeutic effects of suvorexant should be considered when prescribed with inducers of CYP450 3A4. Pharmacologic effects of suvorexant should be monitored more closely whenever an inducer is added to or withdrawn from therapy, and the suvorexant dosage adjusted as necessary.

Food can delay the absorption of suvorexant, which may increase the amount of time it takes for the medication to work. For faster sleep onset, do not take suvorexant with or soon after a meal. Suvorexant should also not be taken with grapefruit juice, as it may significantly increase the levels of medication in the blood. This can increase the risk of side effects including excessive drowsiness, motor impairment, amnesia, anxiety, hallucinations, and breathing difficulties (especially if you have a respiratory disorder such as asthma or obstructive sleep apnea). Talk to your doctor if you have any questions or concerns. You should avoid the use of alcohol while being treated with suvorexant. Avoid driving or operating hazardous machinery until you know how the medication affects you, and do not exceed the dosage or frequency of use prescribed by your doctor. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.