Viberzi is indicated in the treatment of irritable bowel syndrome with diarrhea (IBS-D) in adults. The drug has been shown to relieve the two main symptoms of IBS-D by making stools less loose and watery and reducing bowel contraction. Eluxadoline mixed mu- and kappa-opioid receptor agonist and delta-opioid receptor antagonist provides continued symptom relief in IBS-D
patients. It reduces diarrhea and abdominal pain by directly working on the enteric neurons in the intestine. 1
Viberzi is a first in its class that works on gastrointestinal tract μ / δ receptors. Eluxadoline is Schedule IV controlled substance because of potential for drug abuse and dependency. Commonly Viberzi is administered 100 mg two times a day with food, however in patient who had cholecystectomy, unable to tolerate the 100 mg dose, on concomitant OATP1B1 inhibitors treatment or in patient with mild-moderate hepatic impairment the dose is lowered to 75 mg twice a day.1 Eluxadoline as compared to loperamide in IBS-D treatment has high quality of evidence and in contrast to alosteron, which is only approved for severe IBS-D in women viberzi is efficacious in both men and women for moderate to severe IBS-D. In addition, Viberzi has no risk of bacterial resistance unlike Xifaxan an antibiotic derived from rifampin.1