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In the ultra-rapid metabolizer of codeine:
Group of answer choices
A. The CYP2D6 enzyme is deficient and codeine cannot be converted to morphine
B. Codeine is unusually effective and toxicity may be seen
C. Codeine will not be an effective pain medication and an alternative opiate must be used
D. The liver metabolizes codeine at a variable rate depending on what the individual has eaten or what other drugs the person has taken