What is Acute Liver Failure
Acute liver failure occurs when a previously healthy liver stops working properly in a very short time. Unlike chronic liver disease that develops slowly over years, acute liver failure develops rapidly and can cause severe complications. The liver is responsible for making proteins, controlling bleeding, removing harmful substances from the blood, and helping the body digest food. When the liver suddenly fails, these critical functions stop working.
Main Causes
The leading cause of acute liver failure in the United States is taking too much acetaminophen (a pain reliever and fever reducer found in many medications). Other major causes include hepatitis A, B, and C viruses, alcohol poisoning, autoimmune hepatitis where the immune system attacks liver cells, drug reactions, and exposure to toxic mushrooms or other poisons. In some cases, doctors cannot identify what caused the liver failure.
Symptoms and Warning Signs
Early symptoms include extreme fatigue, nausea, vomiting, and yellowing of the skin and eyes called jaundice. As the condition worsens, patients may experience confusion, difficulty concentrating, changes in sleep patterns, swelling in the abdomen and legs, and easy bruising. In severe cases, patients may go into a coma. These symptoms require immediate emergency medical attention.
Treatment and Outlook
Treatment focuses on supportive care in an intensive care unit, including managing complications like brain swelling, kidney failure, and infections. Doctors may use specific medications depending on the cause, such as antiviral drugs for hepatitis or medications to reverse acetaminophen poisoning. Some patients recover with treatment, while others may need a liver transplant to survive. The outcome depends on the cause, the patient's age and overall health, and how quickly they receive treatment.
Prevention
The risk of acute liver failure can be reduced by taking medications like acetaminophen only as directed, limiting alcohol consumption, getting vaccinated against hepatitis A and B, practicing safe behaviors to prevent hepatitis C transmission, and being cautious with herbal supplements and over-the-counter drugs. Anyone concerned about accidental medication overdose should contact poison control immediately. 
Answer