'''Toxicology''' is a scientific discipline, overlapping with biology, chemistry, pharmacology, and medicine, that involves the study of the adverse effects of chemical substances on living organisms and the practice of diagnosing and treating exposures to toxins and toxicants. The relationship between dose and its effects on the exposed organism is of high significance in toxicology. Factors that influence chemical toxicity include the dosage; the route of exposure; the species, age, sex, and environment.
[[File:Toxicology_Research_at_FDA_(NCTR_1193)_(6009043040).jpg|thumb|right|Research in toxicology at the FDA's National Center for Toxicological Research]]
'''Toxicology''' is the scientific study of the adverse effects of chemical substances on living organisms and the practice of diagnosing and treating exposures to toxins and toxicants. It is a branch of biology, chemistry, and medicine.
== History ==
== History ==
[[File:susruta-manuscript-folio.jpg|thumb|right|An ancient manuscript of Sushruta, an early figure in the history of toxicology]]
The term "toxicology" comes from the ancient Greek words [[toxikon]] (poison for use on arrows) and [[logos]] (study). Toxicology as a distinct scientific discipline is relatively modern. However, the use of poisons and antidotes dates back to ancient times.
== Branches ==
as the modern founder of toxicology. He was a pioneer in the study of poisons and their effects on the human body, and he established toxicology as a distinct scientific discipline.
Toxicology can be split into various disciplines such as:
[[File:Mathieu_Joseph_Bonaventure_Orfila.jpg|thumb|right|Mathieu Joseph Bonaventure Orfila, a key figure in the development of modern toxicology]]
* [[Forensic toxicology]]
* [[Clinical toxicology]]
* [[Environmental toxicology]]
* [[Industrial toxicology]]
* [[Pharmaceutical toxicology]]
== Principles of Toxicology ==
== Toxicity ==
Toxicology is based on several key principles:
Toxicity can refer to the effect on a whole organism, such as an animal, bacterium, or plant, as well as the effect on a substructure of the organism, such as a cell (cytotoxicity) or an organ such as the liver (hepatotoxicity).
* '''Dose-Response Relationship''': The effect of a substance is related to the dose. This principle is fundamental to understanding the toxicity of substances.
== Dose-Response Relationships ==
* '''Exposure Assessment''': Evaluating the extent to which humans and the environment are exposed to chemicals.
* '''Risk Assessment''': Determining the likelihood of adverse effects occurring under specific conditions of exposure.
== Applications ==
The classic "dose makes the poison" concept is a fundamental hypothesis in toxicology. It means that a substance can produce harm only if it reaches a susceptible biological system in a sufficient concentration (dose).
Toxicology has numerous applications in various fields:
== Toxicants ==
* '''Pharmaceuticals''': Assessing the safety and efficacy of new drugs.
Toxicants are substances that produce adverse biological effects. It may be a chemical substance produced artificially or a natural toxin.
* '''Environmental Science''': Studying the impact of pollutants on ecosystems.
* '''Forensic Science''': Analyzing biological samples for the presence of toxins in legal investigations.
== Modern Toxicology ==
== See Also ==
[[File:CDC_Division_of_Laboratory_Sciences_Brochure.pdf|thumb|right|Brochure from the CDC's Division of Laboratory Sciences, highlighting modern toxicological research]]
* [[Poison]]
* [[Toxicity]]
Today, toxicology is a multidisciplinary field that incorporates advances in molecular biology, chemistry, and computational sciences. Modern toxicologists use sophisticated techniques to study the mechanisms of toxicity and to develop safer chemicals and drugs.
* [[Toxicant]]
* [[Toxicology testing]]
== Related Pages ==
* [[Pharmacology]]
* [[Environmental science]]
* [[Forensic science]]
== References ==
== References ==
* Klaassen, C. D. (Ed.). (2013). ''Casarett and Doull's Toxicology: The Basic Science of Poisons''. McGraw-Hill Education.
<references />
* Timbrell, J. A. (2008). ''Principles of Biochemical Toxicology''. CRC Press.
[[Category:Toxicology]]
== Toxicology ==
'''Toxicology''' is the scientific study of the adverse effects of chemical substances on living organisms and the practice of diagnosing and treating exposures to toxins and toxicants. It is a branch of [[biology]], [[chemistry]], and [[medicine]] that involves the study of the symptoms, mechanisms, treatments, and detection of poisoning, especially the poisoning of people.
== History ==
The history of toxicology dates back to ancient times when humans first began to recognize the harmful effects of certain substances. The [[Ebers Papyrus]], an ancient Egyptian medical document, contains information on poisons and antidotes. The Greek physician [[Hippocrates]] and the Roman physician [[Galen]] also contributed to early toxicological knowledge. The field was further developed in the Middle Ages and the Renaissance, with significant contributions from [[Paracelsus]], who is often considered the father of toxicology.
== Principles of Toxicology ==
Toxicology is based on several key principles:
* '''Dose-Response Relationship''': The relationship between the dose of a substance and the severity of its toxic effect. This principle is often summarized by the phrase "the dose makes the poison."
* '''Exposure''': The amount and duration of contact with a toxic substance. Exposure can occur through various routes, including inhalation, ingestion, and dermal contact.
* '''Toxicokinetics''': The study of how a substance enters, moves through, and exits the body. This includes absorption, distribution, metabolism, and excretion.
* '''Toxicodynamics''': The study of the biochemical and physiological effects of toxins and their mechanisms of action.
== Branches of Toxicology ==
Toxicology is a diverse field with several sub-disciplines, including:
* '''Clinical Toxicology''': Focuses on the diagnosis and treatment of poisoning in humans.
* '''Forensic Toxicology''': Involves the use of toxicology for legal purposes, such as determining the cause of death or impairment in legal cases.
* '''Environmental Toxicology''': Studies the effects of environmental pollutants on living organisms and ecosystems.
* '''Occupational Toxicology''': Examines the health effects of chemical exposures in the workplace.
* '''Regulatory Toxicology''': Involves the assessment and regulation of chemicals to ensure public safety.
== Applications of Toxicology ==
Toxicology has numerous applications in various fields:
* '''Pharmaceuticals''': Toxicologists assess the safety and efficacy of new drugs.
* '''Chemical Safety''': Toxicologists evaluate the risks associated with exposure to industrial chemicals and consumer products.
* '''Public Health''': Toxicologists contribute to the development of guidelines and regulations to protect public health from toxic exposures.
* '''Research''': Toxicologists conduct research to understand the mechanisms of toxicity and develop new methods for detecting and treating poisonings.
== Related Pages ==
* [[Pharmacology]]
* [[Environmental science]]
* [[Public health]]
* [[Occupational health]]
* [[Forensic science]]
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Latest revision as of 03:06, 28 March 2025
Toxicology is a scientific discipline, overlapping with biology, chemistry, pharmacology, and medicine, that involves the study of the adverse effects of chemical substances on living organisms and the practice of diagnosing and treating exposures to toxins and toxicants. The relationship between dose and its effects on the exposed organism is of high significance in toxicology. Factors that influence chemical toxicity include the dosage; the route of exposure; the species, age, sex, and environment.
The term "toxicology" comes from the ancient Greek words toxikon (poison for use on arrows) and logos (study). Toxicology as a distinct scientific discipline is relatively modern. However, the use of poisons and antidotes dates back to ancient times.
Toxicity can refer to the effect on a whole organism, such as an animal, bacterium, or plant, as well as the effect on a substructure of the organism, such as a cell (cytotoxicity) or an organ such as the liver (hepatotoxicity).
The classic "dose makes the poison" concept is a fundamental hypothesis in toxicology. It means that a substance can produce harm only if it reaches a susceptible biological system in a sufficient concentration (dose).
