What is the definition of "therapeutic window"?

The term "therapeutic window" refers specifically to the range of drug concentrations within which a medication is effective without causing significant adverse effects or toxicity. This concept is crucial in pharmacology because dosing a drug too low may result in insufficient therapeutic effect, while dosing too high can lead to toxic reactions.

Understanding the therapeutic window helps healthcare providers determine safe and effective dosages for medications. It assists in balancing the efficacy of a drug against the risk of potential side effects, ensuring that patients receive the benefits of treatment while minimizing harm. Hence, the correct answer highlights the critical balance between efficacy and safety, providing a clear understanding of this important pharmacological principle.