In this podcast, I describe the various techniques employed, including mass spectrometry to confirm aspirin toxicity. Toxicology is the study of poisons and the detection of foreign substances in the body that can have a toxic effect such as illicit and legal drugs, industrial chemicals and poisonous gases. Forensic toxicology is the use of toxicology and disciplines such as analytical chemistry, pharmacology and clinical chemistry to aid medical or legal investigation of death, poisoning, and drug use.