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The Claritin Allergy Decongestant Nasal Spray is a 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 especially effective against nasal congestion caused by seasonal and perennial allergies, such as pollen, dust mites, pet dander, and molds. This product is formulated with 0.05% oxymetazoline, a decongestant that acts quickly to reduce inflammation of the nasal membranes and facilitate breathing.