Antihistamines block the effect of histamines on the body and are mainly used to treat allergies. Other uses include treating motion sickness, nausea and anxiety. Antihistamines reduce symptoms such as sneezing, watery eyes and hives when taken by patients with allergies. They are available in capsule, tablet, liquid, eyedrops, injection and nasal spray forms. Second generation (non-sedating) antihistamines do not have the same drowsy side effects of their first-generation counterparts. Popular varieties of second generation (non-sedating) antihistamine include Phenadoz (promethazine) and Zyrtec (cetirizine).
Drugs classified as Second generation (non-sedating) Antihistamines are frequently used to treat the following conditions:
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