Answer:USMLE step 2 Mcq 182:A 20 year old man has mild but persistent year-round symptoms of nasal congestion, rhinorrhea,and watery eyes

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Correct Answer: C

Explanation:
Antihistamine-decongestant preparations remain the initial drug of choice for treatment of allergic rhinitis. These preparation usually control mild-to-moderate symptoms, such as those experienced by the 20-year-old man; however, some patients experience intolerable side effect, such as drowsiness. The second generation antihistamines terfenadine and astemizole are less likely to cause such sedation.


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