Are You Managing Hepatic Encephalopathy the Right Way?

Learn effective hepatic encephalopathy management, treatment options, and prevention strategies for better liver health.

Hepatic encephalopathy (HE) affects up to 30% to 45% of patients with cirrhosis... and is a major predictor of hospital admission and mortality.

HE manifests across a clinical spectrum from minimal/covert HE to overt HE (Grades I–IV)... primarily driven by neurotoxic gut-derived ammonia accumulation due to hepatocellular dysfunction and portosystemic shunting.

Figure (1)

Role of ammonia in hepatic encephalopathy.

NPS-adv

Common precipitating factors include gastrointestinal bleeding, infections (such as SBP), constipation, hypokalemia, dehydration, and sedatives.

Recommend identifying and treating underlying precipitants immediately. Do not restrict dietary protein... maintain 1.2 to 1.5 g/kg/day (and 35 to 40 kcal/kg/day) to prevent muscle wasting, which paradoxically exacerbates hyperammonemia.

Non-absorbable disaccharides (lactulose) are the first-line therapy for overt HE.

Lactulose is fermented by colonic bacteria into short-chain fatty acids... lowering bowel pH to convert ammonia (NH3) into non-absorbable ammonium (NH4+) while exerting an osmotic laxative effect.
Administer 30 to 45 mL PO every 1 to 2 hours for acute HE until a bowel movement occurs, then titrate to 15 to 45 mL 2 to 4 times daily to achieve 2 to 3 soft stools per day.

Use a rectal retention enema (300 mL in 700 mL water) if oral intake is prohibited.

At under $0.50/dose, lactulose is exceptionally cost-effective ($).

NPS-adv

Counsel about side effects like flatulence, abdominal cramps, and diarrhea... and avoid over-titration to prevent dehydration, hypokalemia, and hypernatremia.

Figure (2)

Flowchart for inpatient management and discharge transitions for patients with HE.

Targeted non-absorbable antibiotics (rifaximin) alter bacterial function to reduce ammonia-producing urease gut flora.

Add rifaximin 550 mg PO BID to lactulose for recurrent overt HE or acute refractory cases.
Although acquisition costs are high, it is pharmacoeconomically favorable by substantially decreasing rehospitalization rates.

For rapid gut purging in severe acute overt HE, polyethylene glycol 3350 (4 L over 4 hours) provides rapid clearance... while L-ornithine L-aspartate (LOLA) serves as an effective metabolic ammonia scavenger.

Expect clinical improvement within 24 to 72 hours... with combination lactulose and rifaximin therapy significantly accelerating recovery speed and reducing overall mortality.

References

Bajaj JS, Jakab SS, Jesudian AB, et al. ACG Clinical Guideline: Hepatic Encephalopathy. Am J Gastroenterol. 2026;121(3):588-618.
Meer A. Hepatic encephalopathy: diagnosis and management. The Pharmaceutical Journal. https://pharmaceutical-journal.com/article/ld/hepatic-encephalopathy-diagnosis-and-management⁠.