Drug-induced liver injury (DiLi) is a frequent cause of liver injury and acute liver failure. We aimed to review all hospitalized DILI cases in a tertiary Egyptian center from January 2015 through January 2016. Cases with elevated alanine aminotransferase more than 3-fold and/or alkaline phosphatase more than 2-fold the upper limit of normal value were prospectively recruited and followed for one year. Drug history, liver biopsy whenever feasible and application of Roussel Uclaf causality Assessment Method (RUcAM) were the diagnostic prerequisites after exclusion of other etiologies of acute liver injury. in order of frequency, the incriminated drugs were: Diclofenac (31 cases, 41.3%), amoxicillin-clavulanate (14 cases, 18.7%), halothane toxicity (8 cases, 10.7%), ibuprofen (4 cases, 5.3%), Khat (3 cases, 4%), tramadol (3 cases, 4%), Sofosbuvir with ribavirin (2 cases, 2.7%), and acetylsalicylic acid (2 cases, 2.7%) with one offending drug in 93.3% of cases. Forty-four cases (58.7%) were males; while 56 cases (74.7%) had HCV related chronic liver disease. Thirty-two cases (42.7%) presented with pattern of hepatocellular injury, while 23 cases (30.7%) were with cholestasis, and 20 cases (20.7%) with a mixed hepatocellular/ cholestatic injury. One case received a transplant (0.75%), 7 cases died (9.3%), 23 cases (30.6%) developed liver decompensation (hepatic encephalopathy and ascites), and 44 cases completely resolved (58.7%). In conclusion, Diclofenac is the commonest offender in DILI occurrence in an Egyptian cohort. Age and prothrombin concentration were the only predictors of unfavorable outcomes of DiLi. Drug induced liver injury (DILI) is one of the least understood areas in hepatology research. Since 1960, DILI is considered one of the commonest causes of withdrawal of approved medications from the marketplace 1. The mounting rates of DILI reports had notified it as a leading confusion of acute liver failure (ALF) 2. Despite critical DILI presentations, resolution of injury is common. Typical incriminating factors that were attributed to DILI occurrence were the medical personnel's' unawareness of the drugs morbid effects upon the liver and the availability of the over the counter drugs to the general public. On review of these cases, the main challenges that presented were the paucity of national well-structured notification programs with a subsequent substantial shortage of data registries. In addition, the lack of an objective test for the diagnosis of DILI, similarities to other liver diseases and the difficulty in defining the offending drug in patients on many medicines, complicated its recognition 3. Nevertheless, a high index of suspicion is necessarily to establish the diagnosis 4. In Egypt, there is lack in epidemiological data and DILI registry. This was the reason for designing this prospective study investigating DILI occurrence, demographic, clinical, laboratory and histopathological characteristics along with disease outcomes in an Egyptian cohort. patients and methods This prospective study...