Therapeutic Index · Pharmacology

Which factor does NOT directly influence the therapeutic index of a drug?

  1. Drug potency
  2. Dose-response relationship
  3. Toxic dose
  4. Effective dose
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Correct answer: Drug potency

Therapeutic index depends on the relationship between toxic and effective doses, not directly on potency. Potency refers to the amount of drug needed to produce an effect, whereas TI reflects safety. Thus, a drug may be potent but still have a wide or narrow TI.

Difficulty: Medium Question 6 of 20

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