An adult who has been self-medicating, using nutritional therapy for an elevated cholesterol level, complains of repeated episodes of flushing. The nurse suspects that the patient has been taking:
a. niacin.
b. thiamin.
c. riboflavin.
d. pyridoxine.
ANS: A
Niacin is used to reduce cholesterol levels. When taken in large doses, nicotinic acid can cause vasodilation, with resultant flushing, dizziness, and nausea. Flushing is not a side effect of thiamin, riboflavin, or pyridoxine because they do not cause vasodilation.
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