Antihistamine Nasal Sprays
Excessive histamine function is the primary cause of allergic reactions in people. Histamine is a chemical naturally produced by the body which creates an inflammatory effect to help the immune system remove foreign substances. Antihistamines work by competing for receptor sites to block the function of histamine, thereby reducing the inflammatory effect. These products have gained popularity with sufferers of allergic rhinitis.
Astelin (azelastin hydrocholoride) and Patanase (olopatadine hydrochloride) are the only antihistamines available as a nasal spray in the United States and are available by prescription only. In Australia Telnase (Triamcinolone acetonide) and livostin (Levocabastine hydrochloride) are the most popular products currently on the market and are available over-the-counter.
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