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The Claritin Allergic Congestion Relief Nasal Spray is an over-the-counter nasal spray designed to provide fast, temporary relief from nasal and sinus congestion, as well as sinus pressure, for up to 12 hours. It is a non-drowsy solution that helps alleviate nasal and sinus congestion caused by seasonal allergens (such as tree, grass, and ragweed pollen), perennial allergens (such as dust mites, pet dander, and molds), and colds.