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. First generation 'sedating' antihistamines include Tavist (clemastine) and Atarax (hydroxyzine).
Drugs classified as First generation (sedating) Antihistamines are frequently used to treat the following conditions:
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