Acute liver failure (ALF) is an infrequent, unpredictable clinical sequela of acute liver injury (ALI) in an individual without any previous history of liver disease and is associated with a mortality rate of 50% to 75%. 1 Encephalopathy subsequent to ALI (icterus) is the usual presentation in ALF, and coagulopathy (international normalized ratio [INR] >1.5) is frequent. 1 The etiology of ALF is geographically distinct with varying icterus-encephalopathy interval (IEI), from 4 weeks in India to 26 weeks in the United States. 2 In the United Kingdom, United States, and Europe, ALF etiology is heterogenous (paracetamol, nonsteroidal anti-inflammatory drugs [NSAIDs], autoimmune hepatitis [AIH], and metabolic diseases). 2 In India, ALF has a homogeneous etiology (hepatitis virus in 90%). 1,2 Etiology influences phenotypic presentation.In the United Kingdom, Japan, and France, ALF with IEI of 1 week or 10 days had significantly higher survival than with IEI of longer than 1 week or 10 days, leading to subclassification in ALF as hyperacute (IEI ≤ 7 days), acute (IEI > 7 days to ≤4 weeks), and subacute (IEI of 5 to ≤12 weeks). 3 In India, as a result of homogenous etiology, rapidity of encephalopathy does not influence survival, and all ALF cases have IEI of ≤4 weeks. Therefore, the Indian National Association for the Study of Liver (INASL) consensus in ALF defines it "as a clinical syndrome characterized by encephalopathy, jaundice, and prolonged prothrombin time