Pharmacotherapy of hepatic encephalopathy in cirrhosis

Abstract

Importance of the field: Hepatic encephalopathy (HE) is a major complication encountered in nearly half of the patients with liver cirrhosis.

Areas covered in this review: A review of the safety and efficacy of current therapies for HE that seek to pre-empt ammonia production and/or to increase its elimination, reducing inflammation, blocking benzodiazepine-like compound production, and supporting systemic hemodynamics.

What the reader will gain: Insight into some recent advances in the management of HE that could modify our therapeutic approach to end-stage liver disease. Cirrhotic individuals during an overt HE episode require careful management, focusing on precipitant factors as well as metabolic and hemodynamic derangements.

Take home message: Intestinal ammoniagenesis requires flora modification by antibiotics, prebiotics and probiotics; glutaminase inhibition as well as antibiotics to pre-empt systemic inflammation. Hemodynamic/fluid support is essential. Nutritional support is crucial and hypoproteinemic diets should be avoided. Blocking benzodiazepine-like compounds by the use of flumazenil could be useful in patients with severe, benzodiazepine-induced HE. Long-term rifaximin is well tolerated, does not promote resistance and could decrease overt HE bouts in patients with previous episodes of overt HE. Lactulose is better than no treatment in improving quality of life in patients with minimal HE; it also acts as secondary prophylaxis following overt HE.

Keywords::

• ammonia
• antibiotics
• glutaminase
• hepatic encephalopathy
• inflammation
• rifaximin

Acknowledgements

This study was supported by grants form the Spanish Ministry of Health (Instituto de Salud Carlos III: PI040384 and PI070425). Editorial assistance was by PR Turner.

Notes

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