If Drug a Has an ED₅₀ Value of 12

question 46

Multiple Choice

If drug A has an ED₅₀ value of 12.0 mg/kg, and drug B has an ED₅₀ value of 4.0 mg/kg, what can we say about the potencies of these drugs?

• A) Drug A is three times more potent than drug B.
• B) Drug A is eight times more potent than drug B.
• C) Drug B is three times more potent than drug A.
• D) Drug B is eight times more potent than drug A.

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