X in the graph represents: (A) Therapeutic index, (B) Therapeutic dose, (C) Therapeutic window, (D) Therapeutic efficacy
Answer is C. Therapeutic index : LD50/ED50 Therapeutic window Range of steady-state concentrations of drug that provides therapeutic efficacy with minimal toxicity Therapeutic efficacy: Ability of a drug to activate a receptor and generate a clinical response is Therapeutic efficacy Therapeutic dose: Dose of a drug required to have a clinical response