AZELASTINE nasal spray is a histamine blocker. It helps to relieve itching, running and stuffiness in the nose. This medicine is used to treat nasal symptoms from allergies and other irritants. Flu-like Syndrome chemotherapy side effect, causes, symptom management and when to contact your healthcare provider during cancer treatment. Information about the drug azelastine (Astelin), prescribed for the treatment of allergic rhinitis symptoms. Side effects, dosage, generic, and drug interaction information is included. Astepro (azelastine hydrochloride) Nasal Spray is an antihistamine used for the relief of the symptoms of seasonal and perennial allergic rhinitis in patients 12 years of age and older. Astelin (azelastine hydrochloride) Nasal Spray is an antihistamine that prevents sneezing, itching, runny nose, and other nasal symptoms of allergies. Learn about the potential side effects of Astelin (azelastine). Includes common and rare side effects information for consumers and healthcare professionals. Easy-to-read patient leaflet for Azelastine (Nasal). Includes indications, proper use, special instructions, precautions, and possible side effects. An antihistamine is a type of medicine used to treat common allergy symptoms, such as sneezing, watery eyes, hives, and a runny nose. According to the American College of Allergy, Asthma. Azelastine, an antihistamine, is used to treat hay fever and allergy symptoms including runny nose, sneezing, and itchy nose. This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information. Azelastine comes as a nasal spray. Azelastine usually is sprayed More IMPORTANT SAFETY INFORMATION. DYMISTA can cause sleepiness or drowsiness. Do not drive, operate machinery, or do anything that needs you to be alert until you know how DYMISTA affects you.