When a drug is at its efficacy level but does not reach toxic levels, what is this range known as?

The term that describes the range in which a drug is effective but not toxic is known as the therapeutic window. This range is crucial in pharmacology, as it indicates the span between the minimum effective concentration, where the drug begins to exert its intended effect, and the maximum toxic concentration, where adverse effects may occur. The therapeutic window helps healthcare professionals ensure that a patient receives an effective dose of the medication without approaching the levels that could lead to toxicity. Understanding this concept is essential for maintaining patient safety and optimizing therapeutic outcomes when prescribing and administering medications.