Naselin Nasal Spray is a medication used to relieve nasal congestion and other related symptoms. It contains Oxymetazoline Hydrochloride as an active ingredient, which is a nasal decongestant that reduces swelling in the nasal passages and helps to improve breathing through the nose. Naselin Nasal Spray is commonly used to relieve symptoms of allergies, sinusitis, and the common cold. It can also be used before certain medical procedures that require easy breathing through the nose.