Which of the following drugs has the greatest potential of crossing over from a therapeutic effect to a toxic effect?

Question

Quizplus · Accepted Answer

The ratio of the dose that is toxic to 50% of test subjects (LD₅₀)to the dose that provides relief to 50% of subjects (ED₅₀)is the clinical therapeutic index (TI).This index represents the safety margin of the drug.The smaller the TI,the greater the possibility of crossing from a therapeutic effect to a toxic effect.Drug A has the narrowest TI.

Which of the Following Drugs Has the Greatest Potential of Crossing