What is a "lethal dose"?

A "lethal dose" refers specifically to the amount of a substance that can cause death. This term is often used in pharmacology and toxicology to identify the threshold at which a drug or poison can be fatal. Understanding this concept is crucial, especially in the context of substance use and abuse, as it highlights potential dangers associated with various chemicals and drugs.

In contrast, significant side effects, maximum efficacy, and safe therapeutic use pertain to different aspects of drug administration and effects. While these factors are important in evaluating a substance's safety and efficacy, they do not define a lethal dose, which focuses solely on the capacity of a substance to lead to death. Recognizing the distinction between these concepts can help in assessing the risks and benefits of drug use in clinical practice.