Hepatic encephalopathy (HE) is a decline in brain function caused by severe liver disease. When the liver cannot clear toxins such as ammonia from the blood, they reach the brain and cause confusion, sleepiness, personality changes, poor concentration and a flapping tremor of the hands, progressing in severe cases to coma. It affects 30–40% of people with cirrhosis at some point. HE is usually triggered by something specific, such as infection, constipation, bleeding or dehydration, and it is treatable and often reversible with prompt care.
Key points
- HE ranges from subtle changes (minimal or covert HE) to coma (grade 4).
- Common triggers: infections, GI bleeding, constipation, dehydration, sleeping pills, low potassium.
- Lactulose (to produce 2–3 soft stools a day) and rifaximin are the mainstay of treatment.
- New confusion in a person with liver disease is an emergency.
Table of Contents
- What Is Hepatic Encephalopathy?
- Signs and Symptoms
- The Four Grades of HE
- Common Causes and Triggers
- How HE Is Diagnosed
- Treatment
- What Families Should Do at Home
- Outlook and Prevention
- Frequently Asked Questions
What Is Hepatic Encephalopathy?
A healthy liver removes toxins produced in the gut, especially ammonia from protein digestion. In cirrhosis or acute liver failure, the liver cannot keep up, and blood also bypasses the liver through enlarged veins (portal hypertension). Toxins build up and affect brain cells. In Urdu, families often describe it as the patient becoming “behosh” or “ghunooda” (drowsy and confused). Read liver cirrhosis in Urdu for background.
Signs and Symptoms
- Forgetfulness, poor concentration, slow responses
- Reversed sleep pattern: sleeping in the day, awake at night
- Irritability, mood or personality change, inappropriate behaviour
- Confusion about time and place
- Slurred speech and poor handwriting
- A flapping tremor of the outstretched hands (asterixis)
- Sweet, musty breath (fetor hepaticus)
- Extreme drowsiness, unresponsiveness and coma in severe cases
The Four Grades of HE
| Grade | Features |
|---|---|
| Minimal (covert) | No obvious signs; abnormal on special tests; affects driving and work |
| Grade 1 | Mild confusion, short attention span, anxiety or euphoria, disturbed sleep |
| Grade 2 | Lethargy, disorientation, inappropriate behaviour, flapping tremor |
| Grade 3 | Very drowsy but rousable, marked confusion, incoherent speech |
| Grade 4 | Coma, not responding |
Grades 2–4 are called overt HE and need hospital treatment.
Common Causes and Triggers
- Infection: especially infected ascitic fluid (SBP), urine or chest infection
- GI bleeding from varices or ulcers: blood in the gut is a large protein load
- Constipation
- Dehydration from vomiting, diarrhoea or too much water-tablet
- Low potassium or sodium
- Sedatives: sleeping pills, anxiety medicines, opioids
- Kidney problems
- Stopping lactulose, or a very large protein meal
How HE Is Diagnosed
Diagnosis is clinical, based on the history and examination in someone with liver disease, after excluding other causes of confusion such as low blood sugar, stroke, head injury, alcohol withdrawal or infection of the brain. Blood tests (sodium, potassium, kidney function, blood count, infection markers), ascitic fluid tests and sometimes a CT scan of the head are done. Ammonia levels can support the diagnosis but are not needed in every case.
Treatment
- Find and treat the trigger: antibiotics for infection, endoscopic treatment for bleeding (such as band ligation), fluids and correction of salts.
- Lactulose: a syrup that draws ammonia into the bowel and clears it; the dose is adjusted to give 2–3 soft stools daily.
- Rifaximin: an antibiotic that reduces ammonia-producing gut bacteria and prevents recurrence.
- Nutrition: adequate protein (do not starve the patient), small frequent meals and a late-evening snack.
- Stop sedatives and review all medicines.
- Liver transplant evaluation for recurrent or persistent HE; see liver transplant evaluation.
What Families Should Do at Home
- Give lactulose regularly and track bowel movements (2–3 soft stools a day)
- Watch for early changes: daytime sleepiness, confusion, unusual behaviour
- Avoid sleeping tablets and unprescribed medicines
- Ensure good fluid intake and regular meals
- Seek urgent care for fever, black stools, vomiting blood or worsening confusion
- The patient should not drive if HE has occurred
Outlook and Prevention
An episode of HE usually improves within days once the trigger is treated. However, it signals advanced liver disease, so long-term follow-up, preventive lactulose and rifaximin, and transplant assessment are important. Treating the underlying cause, such as curing hepatitis C or stopping alcohol, can improve liver function over time.
Dr. Omer Hassaan Aftab Ahmad, hepatologist at G-8 Markaz, Islamabad, manages patients with cirrhosis and hepatic encephalopathy, including prevention plans and family guidance. See our cirrhosis treatment page.
Urdu Mein Khulasa
ہیپاٹک انسیفیلوپیتھی جگر کی شدید بیماری میں دماغ پر اثر کو کہتے ہیں۔ جگر خون سے زہریلے مادے جیسے امونیا صاف نہیں کر پاتا تو مریض الجھن، غنودگی، رویے میں تبدیلی اور ہاتھوں کے کانپنے کا شکار ہو جاتا ہے اور شدید صورت میں بے ہوش ہو جاتا ہے۔ انفیکشن، خون بہنا، قبض، پانی کی کمی اور نیند کی گولیاں اس کی عام وجوہات ہیں۔ لیکٹولوز شربت اور ریفیکسیمین سے علاج ہوتا ہے۔ جگر کے مریض میں نئی الجھن یا غنودگی ہو تو فوراً ہسپتال لے جائیں۔
Frequently Asked Questions
What are the early signs of hepatic encephalopathy?
Poor concentration, forgetfulness, day-night sleep reversal, irritability and mild confusion are early signs. Families often notice them before the patient does.
What are the four stages of hepatic encephalopathy?
Grade 1 (mild confusion), grade 2 (lethargy and disorientation), grade 3 (severe drowsiness and confusion) and grade 4 (coma).
What is the most common cause of hepatic encephalopathy?
Liver cirrhosis is the underlying cause; common triggers are infection, GI bleeding, constipation and dehydration.
Can hepatic encephalopathy be cured?
Episodes are usually reversible with treatment, but they can recur. A liver transplant cures the underlying problem in suitable patients.
Why is lactulose given in liver disease?
Lactulose helps remove ammonia from the gut and prevents its absorption, reducing confusion. The aim is 2–3 soft stools a day.
Conclusion
Hepatic encephalopathy is a sign that the liver needs urgent attention, but with quick treatment of the trigger and regular lactulose and rifaximin, most episodes improve. If a family member with liver disease becomes confused or drowsy, seek emergency care. For long-term cirrhosis management in Islamabad, consult Dr. Omer Hassaan Aftab Ahmad on 0336 5993116.
