Flomist Inhaler is a nasal spray primarily used to relieve symptoms of seasonal and year-round allergies, such as a runny, stuffy, or itchy nose, sneezing, and red, itchy, or watery eyes. The active ingredient, Fluticasone Propionate, is a corticosteroid that works by reducing inflammation and swelling in the nasal passages. The usual dosage involves spraying in each nostril as directed by a healthcare professional, typically once or twice daily. While generally safe, potential side effects can include nosebleeds, nasal irritation, and sneezing. It's important to use Flomist regularly at evenly spaced intervals to get the most benefit from it.