Alerflo Nasal Spray is a steroid. It relieves the symptoms of allergic rhinitis such as runny nose, sneezing and sinus discomfort. It works by blocking the production of certain chemical messengers that cause inlammation (swelling) and allergies, thus relieving the discomfort and irritation in your nose. You should always use Alerflo Nasal Spray as advised by your doctor. To get the full benefit of the medicine you should use it regularly. Normally, you should blow your nose gently before using it, keep one nostril closed while applying the medicine into the other, and then sniff hard to make sure it reaches deep into the nose. Then repeat for the other nostril.