Flunisolide is primarily used as a corticosteroid to manage and treat inflammatory conditions, particularly in the respiratory system. It is commonly prescribed in the form of nasal sprays to alleviate symptoms of allergic rhinitis, such as sneezing, congestion, and runny nose. By reducing inflammation in the nasal passages, it helps improve breathing and overall comfort for individuals suffering from seasonal or year-round allergies. Additionally, flunisolide is used in inhalers to control asthma symptoms by decreasing swelling and irritation in the airways, making it easier to breathe. Its anti-inflammatory properties make it effective in preventing asthma attacks and managing chronic respiratory conditions when used regularly as directed.