Toxicology is the science of poisons. Clinical toxicology is concerned with disease caused by chemicals, drugs, and toxins and usually involves management of acute and chronic poisoning. Clinical toxicologists work in poison centers, hospitals, and government agencies. Analytical toxicology involves the application of the tools of analytical chemistry to the quantitative and/or qualitative estimation of chemicals that may exert effects on living organisms and it has its roots in forensic applications. Forensic toxicology involves the use of toxicology for the purposes of the law, industry, and academia.