The Point-of-care Assessment of Drug-Induced Liver Injury (POC-DILI) Study aims to develop blood testing for liver injury during the early stages of assessment of people who have taken a paracetamol overdose. This trial will use two new medical devices – a Lateral Flow Assay (LFA) designed to measure the biomarker K18, and a handheld Raman Reader to read the LFA. Adults who take part in this study will have blood samples taken up to 5 days after presenting to the ED, with hospital data collected for up to 30 days.