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Hepatic Encephalopathy
Hepatic encephalopathy is confusion and altered brain function caused by a failing liver letting toxins (like ammonia) build up in the blood and reach the brain.
Causes & risk factors
- Advanced liver disease or cirrhosis
- A build-up of ammonia and other toxins
- Triggers: infection, constipation, bleeding in the gut, dehydration
- Certain sedative medicines
- Too much protein at once in severe liver disease
Common symptoms
- Confusion and poor concentration
- Drowsiness or disturbed sleep
- A flapping tremor of the hands
- Personality or mood changes
- Disorientation
- In severe cases, reduced consciousness
Tests & diagnosis
- Clinical assessment of mental state
- Blood ammonia level
- LFT
- Electrolytes
- CBC (to look for infection)
Treatment & management
- Find and treat the trigger — infection, bleeding or constipation
- Lactulose to clear ammonia through the bowel
- Certain antibiotics (such as rifaximin) to reduce gut toxins
- Careful, balanced protein intake with dietitian advice
- Treat the underlying liver disease; consider transplant
When to see a doctor urgently
- New confusion or drowsiness in someone with liver disease — seek urgent care
- Unresponsiveness or difficulty waking
- Vomiting blood or black stools with confusion
- Fever suggesting an infection is triggering it
Frequently asked questions
Is hepatic encephalopathy reversible?
Often yes. When the trigger is treated and toxins are cleared with lactulose, mental state usually improves. It can recur, so ongoing treatment and avoiding triggers are important.
Should people with liver disease avoid protein?
No — severe protein restriction is now discouraged, as the body needs protein. Intake is balanced and spread through the day with dietitian guidance.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.