Toxicology is a branch of science that deals with adverse effects of chemical, physical and biological agents on living organisms and environment.. The exposure of toxic agent can be from environment, occupational or by deliberate self harm. The various sub division include forensic toxicology, medical toxicology, environmental toxicology, ecotoxicology. Though all of us are frequently exposed to toxic agents in our day today life, we are not informed of the adverse effects. This issue is mainly intended to provide such general informations, preventive measures and advances in treatment for health related problems.