Toxicology and Pharmacology:

Toxicology is the scientific study of harmful effects that occur in living organisms due to chemicals. It involves observing and reporting symptoms, mechanisms, detection and treatments of toxic substances, in specific relation to the poisoning of humans. It comprises chemical compounds and environmental agents found in nature, as well as pharmaceutical compounds that are synthesized for medical use by humans. These substances may produce toxic effects in living organisms including disturbance in growth patterns, discomfort, disease and death.

Pharmacology is the branch of medicine deals with the uses, effects, and modes of action of drugs. It is the science of drugs including their origin, composition, pharmacokinetics, therapeutic use, and toxicology. The properties and reactions of drugs especially with relation to their therapeutic value