An older female patient believes taking high doses of vitamin A will help preserve her eyesight. What information about vitamin A should the nurse include when responding to the patient?
A) The vitamin can build up too high in the blood.
B) Taking too much vitamin A can lead to dehydration.
C) The vitamin can be displaced at protein-binding sites.
D) The vitamin can build up too high in the adipose tissues.
D
Feedback:
In the elderly, especially women, adipose tissue increases compared with lean body mass. Drugs stored in adipose tissue, such as lipid-soluble vitamins like vitamin A, will have increased tissue concentrations and longer duration in the body. Vitamin A is not highly protein bound, will not be stored in the blood, and does not lead to dehydration.
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