A nurse is assessing a client who has seasonal allergies and is taking an antihistamine. Which of the following findings is an adverse effect of this type of medication?
Photophobia
Diarrhea
Dry mouth
Increased blood pressure
The Correct Answer is C
A. Photophobia: Photophobia is not a common side effect of antihistamines. It can be associated with other conditions, but not typically with antihistamine use.
B. Diarrhea: Diarrhea is not a common side effect of antihistamines; they are more likely to cause constipation due to their anticholinergic effects.
C. Dry mouth: Dry mouth is a common anticholinergic effect of antihistamines. It occurs because these medications block acetylcholine, leading to decreased saliva production.
D. Increased blood pressure: Increased blood pressure is not a typical side effect of antihistamines. While some formulations may cause increased heart rate or palpitations, they do not generally lead to hypertension directly.
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Correct Answer is C
Explanation
A. Friction rub: A friction rub is usually associated with pleuritis, not atelectasis. Atelectasis involves the collapse of alveoli and does not produce this sound.
B. Decreasing respiratory rate: Atelectasis generally leads to an increased respiratory rate as the body compensates for decreased oxygenation.
C. Increasing dyspnea: Increasing dyspnea is common in atelectasis as collapsed alveoli reduce oxygen exchange, leading to shortness of breath and increased respiratory effort.
D. Facial flushing: Facial flushing is not typically associated with atelectasis; instead, atelectasis leads to signs of respiratory distress, such as dyspnea and possibly cyanosis.
Correct Answer is D
Explanation
A. "Gradually decrease the dose once tolerance to the effect is reached." Tolerance can develop over time, but this approach is not the most effective or safest way to manage sedation.
B. "Take the medication with meals." Taking diphenhydramine with food may help with gastrointestinal side effects but does not reduce sedation.
C. "Distribute the doses evenly throughout the day." Distributing doses evenly may not effectively reduce sedation, as diphenhydramine has sedative effects regardless of timing.
D. "Take the daily dose at bedtime.” Taking diphenhydramine at bedtime can minimize daytime sedation, as the sedative effects will occur during sleep.