Why are second-generation antihistamines often preferred to first-generation histamines in the treatment of hypersensitivity reactions?
A)Second-generation antihistamines are faster acting than first-generation antihistamines.
B)Second-generation antihistamines are less likely than first-generation antihistamines to cause drowsiness.
C)Second-generation antihistamines are available over the counter, whereas first-generation antihistamines require a prescription.
D)Second-generation antihistamines can be administered either orally or parenterally, whereas first-generation antihistamines can only be given via the oral route.

Question

Quizplus · Accepted Answer

A)An important difference between first- and second-generation antihistamines is that unlike the first-generation drugs, the newer second-generation drugs do not cause drowsiness. Both first- and second-generation antihistamines are available by prescription and over the counter. The preferred route of administration for both first- and second-generation antihistamines is oral, although diphenhydramine (a first-generation drug)and some other medications may be given parenterally. Second-generation antihistamines are not universally faster-acting than their first-generation counterparts.
B)An important difference between first- and second-generation antihistamines is that unlike the first-generation drugs, the newer second-generation drugs do not cause drowsiness. Both first- and second-generation antihistamines are available by prescription and over the counter. The preferred route of administration for both first- and second-generation antihistamines is oral, although diphenhydramine (a first-generation drug)and some other medications may be given parenterally. Second-generation antihistamines are not universally faster-acting than their first-generation counterparts.
C)An important difference between first- and second-generation antihistamines is that unlike the first-generation drugs, the newer second-generation drugs do not cause drowsiness. Both first- and second-generation antihistamines are available by prescription and over the counter. The preferred route of administration for both first- and second-generation antihistamines is oral, although diphenhydramine (a first-generation drug)and some other medications may be given parenterally. Second-generation antihistamines are not universally faster-acting than their first-generation counterparts.
D)An important difference between first- and second-generation antihistamines is that unlike the first-generation drugs, the newer second-generation drugs do not cause drowsiness. Both first- and second-generation antihistamines are available by prescription and over the counter. The preferred route of administration for both first- and second-generation antihistamines is oral, although diphenhydramine (a first-generation drug)and some other medications may be given parenterally. Second-generation antihistamines are not universally faster-acting than their first-generation counterparts.

Why Are Second-Generation Antihistamines Often Preferred to First-Generation Histamines in the Treatment