FPGEE NABP Practice Exam 2025 – Complete Prep Resource

Question: 1 / 650

What is the definition of LD50?

The dose that kills half of the test group

The definition of LD50 refers to the lethal dose of a substance that is required to kill half of the members of a tested population, typically expressed as the amount of substance per unit of body weight. This measure is commonly used in toxicology to assess the relative toxicity of substances. Understanding LD50 is crucial for evaluating the safety and potential risks associated with exposure to chemicals, drugs, or other agents.

This concept helps researchers and healthcare professionals to compare the toxicity of different substances and to make informed decisions regarding dosage and safety precautions. By establishing the LD50, it becomes possible to identify safe exposure levels and to understand how variations in individual physiology might affect the outcome of exposure to the toxic agent. The other choices pertain to different pharmacokinetic or pharmacodynamic parameters that are not relevant in defining LD50.

Get further explanation with Examzify DeepDiveBeta

The dose that causes therapeutic effect in half of the population

The maximum effective concentration

The amount of drug eliminated by the body

Next Question

Report this question

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy