When teaching clients taking levodopa alone, the nurse should instruct them not to take vitamin supplements containing:
a. pyridoxine (B6). c. riboflavin (B2).
b. thiamine (B1). d. cyanocobalamin (B12).
ANS: A
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A Correct: Pyridoxine facilitates the breakdown of levodopa, decreasing its effects.
B Incorrect: This does interfere with action of levodopa.
C Incorrect: This does interfere with action of levodopa.
D Incorrect: This does interfere with action of levodopa.
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