The field of toxicology is defined as the study of stressors and their adverse effects. One discipline
should deals with hazard identification, mechanistic toxicology, and risk assessment. Thus emerge a
new field called toxicogenomics. Toxicogenomics is a rapidly developing discipline that promises to aid
scientists in understanding the molecular and cellular effects of chemicals in biological systems. This
is a comparatively new field of biological inquiry now providing insights into the toxic effects of
chemicals on biological systems and helping investigators to predict risks associated with exposure to
these agents. This field encompasses global assessment of biological effects using technologies such
as DNA micro arrays or high throughput NMR and protein expression analysis.
Key words: Genomics, toxicogenomics, toxicology.