A healthy 70-year-old has been using diphenhydramine (Benadryl) for allergic rhinitis. One week later, the client begins to exhibit signs of confusion and disorientation. The spouse calls the primary care facility to speak with the nurse
Which event should the nurse suspect first?
A) The older adult has hyponatremia, leading to delirium.
B) The older adult is having transient ischemic attacks.
C) The older adult has an overwhelming infection.
D) The older adult is experiencing an adverse drug effect.
Ans: D
The older adult has been taking diphenhydramine, which can have an anticholinergic effect. Anticholinergic drugs can lead to medication-induced cognitive impairment. There is no reason to think that the client has hyponatremia. Rhinitis does not generally cause delirium in older adults. The client is more likely to be having adverse reaction than transient ischemic attacks.
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