Question: Question 3 Dose-Response Curve Substance A Substance B Substance A 100 - Therapeutic Effect Toxic 75- Effect Response (%) 50 25 - 6 8 10

Question 3 Dose-Response Curve Substance A
Question 3 Dose-Response Curve Substance A Substance B Substance A 100 - Therapeutic Effect Toxic 75- Effect Response (%) 50 25 - 6 8 10 12 14 16 18 20 22 Dose (mg/kg) Using the dose-response curve above answer the following questions: a. Which substance has the highest potency? Explain your answer. Answer- Substance A reaches the 50% response at a lower dose compared to Substance B. Therefore, Substance A is more potent because a smaller dose is required to achieve the same effect. Explanation- Potency is defined as the amount of a substance required to produce an effect of given intensity. The more potent a substance is, the lower the dose required to achieve a given effect. b. Define NOEL. What is the NOEL range of substance B? NOEL- C. What is the ED50 and TD50 of substance A? How did you determine these values? d. The therapeutic index of substance B is 9. Comparing substance A to substance B, which one would be considered safer? Explain your answer. e. At what dose is the maximum toxic effect of substance A observed? Explain your answer. F . At what dose is threshold reached for substance B? What is the threshold of a substance

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