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antihistamine
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Antihistamine
Any substance that counteracts the effects of histamine. Antihistamines may occur naturally or they may be synthesized.
H1 antihistamines are used to relieve allergies, alleviating symptoms such as runny nose, itching, swelling, or asthma. H2 antihistamines suppress acid production by the stomach, and are used in the treatment of peptic ulcers, often making surgery unnecessary.
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Orange symbolizes the Sahara Desert. The orange disc represents the sun. Green recalls the country's forests. White stands for the River Niger. Effective date: 23 November 1959.
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