Beclomethasone nasal spray is used to relieve symptoms of sneezing, runny, stuffy, or itchy nose (rhinitis) caused by hay fever, other allergies, or vasomotor (nonallergic) rhinitis. It is also used to prevent nasal polyps (swelling of the lining of the nose) after nasal polyp removal surgery. Beclomethasone nasal spray is in a class of medications called corticosteroids. It works by blocking the release of certain natural substances that cause allergy symptoms.