Drug Interaction Report

Consumer information for this interaction is not currently available.

MONITOR: Coadministration of momelotinib may increase the plasma concentrations and effects of drugs that are substrates of the P-glycoprotein (P-gp) efflux transporter. The proposed mechanism is increased exposure of the P-gp substrate due to inhibition of intestinal P-gp efflux transporter. However, clinical data are not available.

MANAGEMENT: Caution is recommended with the concomitant use of momelotinib and P-gp substrates, particularly those with a narrow therapeutic index. Dosage adjustments as well as clinical and laboratory monitoring should be considered whenever momelotinib is added to or withdrawn from therapy with these drugs. Individual product labeling for the coadministered drug may also be consulted for specific guidance.

Alcohol can increase the nervous system side effects of dextromethorphan such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with dextromethorphan. Do not use more than the recommended dose of dextromethorphan, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. Talk to your doctor or pharmacist if you have any questions or concerns.