Toxicology is a branch of biology, chemistry, and pharmacology concerned with the study of the adverse effects of chemicals on living organisms. It also studies the harmful effects of chemical, biological and physical agents in biological systems that establishes the extent of damage in living organisms. The relationship between dose and its effects on the exposed organism is of high significance in toxicology.
Toxicology is a branch of natural science that aims at fulfilling the educational, research and service needs of related centers such as universities, research centers, pharmaceutical, chemical, and food industry, monitoring centers, divisions of toxicology at hospitals, laboratories, monitoring centers for blood concentration of drugs, legal medical centers, poison and drug information centers, pharmaceutical quality control laboratories and other related organizations.