Budget impact of optimizing rifaximin-α use for the prevention of recurrent hepatic encephalopathy in The Netherlands

Rifaximin-α in Patients With Recurrent Episodes of Hepatic Encephalopathy Due to Cirrhosis Reduces Healthcare Utilization

BACKGROUND AND AIMS

Hepatic encephalopathy is a frequent complication of cirrhosis. Rifaximin-α has been included in guidelines for secondary prevention of hepatic encephalopathy, but there are few real-world data on its efficacy and impact on healthcare utilization. In this study, we aimed to assess the effect of rifaximin-α on healthcare utilization.

METHOD

We conducted a cohort analysis in patients from seven hospitals in the Netherlands, who received rifaximin-α as secondary prophylaxis for hepatic encephalopathy. Data were compared 6 months before and 6 months after the prescription of rifaximin-α. The primary endpoint was the effect of rifaximin-α on healthcare utilization. Secondary endpoint was the effect of rifaximin-α on healthcare costs.

RESULTS

We included 126 patients (65% male; median age 68) with a median Model for End-stage Liver Disease score of 15. The mean number of hepatic encephalopathy episodes after starting rifaximin-α was lower than before starting rifaximin-α (0.9 vs. 2.2; p < 0.001). Mean healthcare utilization decreased from 6.1 contacts in the 6 months before rifaximin-α to 3.3 contacts in the 6 months after starting rifaximin-α (p < 0.001). The mean number of hospital admissions decreased from 1.7 admissions per patient to 1.0 admissions after starting rifaximin-α (p < 0.001). The mean number of outpatient visits also decreased after starting rifaximin-α (2.4 visits per patient to 1.7; p = 0.001). Annual costs per patient before starting rifaximin-α were €13,320. This was similar to the costs after rifaximin-α was prescribed (€13,120).

CONCLUSION

Rifaximin-α significantly reduced the number of episodes of hepatic encephalopathy, the number of hospital admissions as well as the number of outpatient and emergency department visits, contributing to a reduction in healthcare utilization. There was no reduction in overall costs.

Prophylaxis of hepatic encephalopathy: current and future drug targets

Hepatic encephalopathy is described by a broad spectrum of neurological and psychiatric aberrations resulting due to advanced liver dysfunction. It is a neurological disorder due to hepatic insufficiency and/or portosystemic shunts. Its clinical presentation includes neuropsychiatric dysfunction ranging from subclinical changes to comatose state. It is a sign of poor prognosis in cirrhotics with a high 1-year mortality. Each episode of hepatic encephalopathy leads to high hospitalization rate, poor prognosis and raised burden of healthcare. Primary prophylaxis is prevention of initial occurrence and secondary prophylaxis is prevention of reappearance of hepatic encephalopathy in subjects who had prior history. Early detection and management of triggers is very important in the treatment of hepatic encephalopathy. The initial choice of treatment is still lactulose, as it is effective in minimal, overt, and recurrent hepatic encephalopathy. Rifaximin is equally effective as lactulose in managing hepatic encephalopathy and is better tolerated. Branch chain amino acids are beneficial in subjects who are protein intolerant. L-ornithine L-aspartate and probiotics are also useful in the management of hepatic encephalopathy. Rifaximin along with lactulose is effective in managing overt and recurrent hepatic encephalopathy. Large portosystemic shunts embolization and liver transplant is efficacious in certain group of patients. Nutritional therapy and fecal microbiota transplantation are newer therapies for hepatic encephalopathy but the evidences are limited, more research is required to prove their efficacy. Involvement of hospital pharmacists, telemedicine, and providing education are also beneficial in managing hepatic encephalopathy.

Rifaximin Alfa and Liver Diseases: More Than a Treatment for Encephalopathy, a Disease Modifier

RFX, a rifamycin-based antibacterial agent obtained by the culture of the actinomycete Streptomyces mediterranei, has a broad antibacterial spectrum covering gram- positive, gram-negative, aerobic, and anaerobic bacteria. RFX is an antibiotic that elicits its effect by inhibiting bacterial RNA synthesis. When administered orally, its intestinal absorption is extremely low (<0.4%), restricting antibacterial activity mainly in the intestinal tract, with few systemic side effects. RFX has been recommended by the American Association for the Study of Liver Diseases and the European Association for the Study of the Liver guidelines for the treatment of HE. RFX may contribute to restore hepatic function and to decrease the development of liver fibrosis. Its efficacy has been shown in patients with previous hepatic encephalopathy and several complications, such as infections, including spontaneous bacterial peritonitis, ascites and oesophageal variceal bleeding. Thus, RFX has an outstanding role in the therapeutic arsenal in hepatic cirrhosis, under the concept of disease modifier.