Triamcinolone nasal spray is used to prevent, or ease, allergic rhinitis. This is a condition where the inside of your nose becomes inflamed and irritated. Common symptoms include sneezing, a blocked or congested nose, a runny nose (watery discharge), and an itchy nose. It is caused by allergies, such as hay fever. Triamcinolone belongs to a group of medicines called corticosteroids. It reduces inflammation and swelling and so relieves the congestion, itching, sneezing, irritation and discomfort of rhinitis. Triamcinolone nasal spray is prescribable by a doctor. You can also buy smaller packs without a prescription at pharmacies.