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Related Concept Videos

Drug Regulation01:25

Drug Regulation

Drug regulation encompasses the management of drug usage by evaluating its safety and efficacy through assessments conducted by regulatory authorities. Regrettably, the history of drug regulation is marred by several catastrophic events. One such incident is the Elixir Sulfanilamide tragedy, in which the toxic compound diethyl glycol was included in a sweet-tasting medication, leading to numerous fatalities. This event prompted the enactment of the Food, Drug, and Cosmetic Act in 1938. Under...
Effects of Chemicals: Overview01:27

Effects of Chemicals: Overview

Drugs, encompassing various chemical compounds from natural sources, lab synthesis, or genetic engineering, elicit different biological responses in living organisms. Some of these responses are desirable or therapeutic, while others are undesirable. The primary goal of administering a drug is to achieve a therapeutic effect, that is, to address a specific disease or health condition. Any concurrent effects outside of this therapeutic outcome are considered undesirable. These undesirable...
Chemical Equilibria: Systematic Approach to Equilibrium Calculations01:21

Chemical Equilibria: Systematic Approach to Equilibrium Calculations

Equilibrium calculations for systems involving multiple equilibria are often complex. For example, to calculate the solubility of a sparingly soluble salt in an aqueous solution in the presence of a common ion, one must consider all the equilibria in this solution. Calculations for these systems can be complicated and tedious, so a systematic approach with a series of steps is often helpful. The process is detailed below.
The first step is to identify all the chemical reactions involved, The...
Drug Toxicity: Risk factors01:24

Drug Toxicity: Risk factors

Adverse Drug Reactions (ADRs) are potential complications that arise during pharmacotherapy, influenced by multiple risk factors. Age plays a significant role; both neonates and the elderly are at heightened risk due to their respective immature and diminished metabolic and elimination processes. Gender also impacts ADRs, with females experiencing a 1.5 to 1.7-fold greater risk than males, which may be linked to pharmacokinetic, pharmacodynamic, and hormonal differences. Notably, neonates, the...
Toxicity Testing in Animals01:23

Toxicity Testing in Animals

Toxicity tests in animals are grounded on two main assumptions: first, the effects observed in laboratory animals can be extrapolated to humans, especially when adjusted for body surface area; second, high-dose exposure in animals is essential to identify potential human hazards from lower doses. This is based on the quantal dose-response concept, which faces the challenge of extrapolating results from relatively few test animals to much larger human populations. For example, a 0.01% incidence...
Pharmaceutical Poisoning: Potential Scenarios01:26

Pharmaceutical Poisoning: Potential Scenarios

Pharmaceutical poisoning can occur through various channels, impacting an estimated 2 million hospitalized patients in the U.S. annually with serious adverse drug responses. These scenarios encompass both therapeutic uses, such as drug toxicity, where even standard dosages can lead to severe central nervous system depression, and non-therapeutic exposures, including accidental ingestion by children, and environmental and occupational exposures.Unintentional poisonings often involve exploratory...

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Related Experiment Video

Updated: Jul 25, 2026

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms
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Diet: the neglected variable in chemical safety evaluations

P M Newberne1, A V Sotnikov

  • 1Department of Pathology, Boston University School of Medicine, Massachusetts, USA.

Toxicologic Pathology
|November 1, 1996
PubMed
Summary

Dietary factors significantly impact drug safety evaluations in animals. Understanding nutrient levels, contaminants, and their effects on animal health is crucial for accurate risk assessment and regulatory approval.

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Area of Science:

  • Toxicologic Pathology
  • Experimental Nutrition
  • Chemical Safety Evaluation

Background:

  • Animal diets in safety evaluations can contain unintended contaminants.
  • Nutrient levels (calories, protein, fat) may be inadequate or excessive for research animals.
  • Dietary variables can influence animal responses to xenobiotics and overall health.

Purpose of the Study:

  • To inform toxicologic pathologists about significant dietary factors in animal safety studies.
  • To review the impact of diet on drug and chemical safety evaluations.
  • To introduce digital specimen technology for histopathology assessment.

Main Methods:

  • Integration of fundamental nutrition, toxicology, and experimental pathology techniques.
  • Analysis of data accumulated over four decades of research.
  • Review of studies on contaminants and nutrient variations in animal diets.

Main Results:

  • Commercial animal diets can contain natural and man-made contaminants.
  • Suboptimal nutrient levels affect xenobiotic metabolism, immunocompetence, and secondary diseases.
  • Dietary variations can lead to misinterpretations of human risk for chemicals.

Conclusions:

  • Dietary components and contaminants critically influence safety evaluation outcomes.
  • Greater consideration of diet and novel assessment technologies is needed.
  • Accurate dietary assessment is vital for drug approval and human risk evaluation.