At a dose of 10 mg, drug X lowers total cholesterol by 50 mg/dL, while a maximum drop in cholesterol of 65mg/dL is achieved at 40 mg
At a dose of 5 mg, drug Y lowers cholesterol by 50 mg/dL, while a maximum drop in cholesterol of 55 mg/dL is achieved at 10 mg. What can be concluded about the efficacy and potency of these two drugs?
1. Drug X is more potent, and drug Y has a higher efficacy.
2. Drug X is more potent, and has higher efficacy.
3. Drug Y is more potent, and has higher efficacy.
4. Drug Y is more potent, and drug X has a higher efficacy.
Correct Answer: 4
Rationale: Drug Y causes a greater drop in cholesterol at lower doses (higher potency), whereas drug X causes the highest drop in total cholesterol (efficacy).
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