Dr. Naren Gunja is a Clinical Professor in the Faculty of Medicine and Health at the University of Sydney, associated with Sydney Medical School and the Discipline of Emergency Medicine. He obtained his MBBS from the University of Sydney from 1992 to 1997, an MSc, and holds fellowships FACEM, FACMT, and FAIDH. Since 1998, he has worked as a Clinical and Forensic Toxicologist at Western Sydney Local Health District, managing patients presenting with poisoning and envenomation at facilities including Westmead Hospital. His career includes roles as an emergency physician and toxicologist, with recognition as Clinical Associate Professor at the University of Sydney since 2006. He serves on the Advisory Group for the Digital Health & Informatics Network at the University of Sydney.

Gunja's research specializations encompass clinical toxicology, forensic toxicology, emergency medicine, and clinical informatics. He maintains an active publication record with over 100 papers. Highly cited contributions include "Energy drinks: health risks and toxicity" (Medical Journal of Australia, 2012), "The clinical and forensic toxicology of Z-drugs" (Journal of Medical Toxicology, 2013), "In the Zzz zone: the effects of Z-drugs on human performance and driving" (Journal of Medical Toxicology, 2013), "Management of intentional superwarfarin poisoning with long-term vitamin K and brodifacoum levels" (Clinical Toxicology, 2011), "Activated charcoal decreases the risk of QT prolongation after citalopram overdose" (Annals of Emergency Medicine, 2007), "Survival after massive hydroxychloroquine overdose" (Anaesthesia and Intensive Care, 2009), and "Efficacy of a two bag acetylcysteine regimen to treat paracetamol overdose (2NAC study)" (eClinicalMedicine, 2020). Recent works feature "Risk Factors Associated with Deterioration in Sedative Drug Overdose" (2026), "Early Cessation of Acetylcysteine Treatment After Paracetamol Overdose (NACSTOP 2)" (2026), "The Impact of Electronic Medication Management Systems on Medication Deviations on Admission and Discharge from Hospital" (2023), "Toxicology presentations to a tertiary unit in New South Wales during the COVID-19 pandemic first wave" (2022), and studies on electronic medication management implementation and self-harm surveillance. His publications address overdose management, poisoning patterns, health technology adoption, and envenomation outcomes.

Professional Email: naren.gunja@sydney.edu.au