Newer "Second-Generation" Antihistamines Such as Cetirizine (Zyrtec)and Desloratidine (Clarinex)may Be

Newer "second-generation" antihistamines such as cetirizine (Zyrtec) and desloratidine (Clarinex) may be preferred to traditional antihistamines because these newer drugs

A) cross the blood brain barrier more easily than traditional drugs
B) produce less gastric irritation than traditional drugs
C) bind to more subtypes of histamine receptors (i.e., newer drugs are less selective for the H1 receptor subtype)
D) all the above are true
E) none of the above are true

Correct Answer:

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