Used as an active pharmaceutical ingredient in antiviral medications, particularly in the treatment of influenza. It functions as a neuraminidase inhibitor, preventing the release of viral particles from infected cells, thereby reducing the spread of the virus within the respiratory tract. Effective against both influenza A and B strains, it is administered via inhalation and is commonly used for both treatment and prophylaxis in adults and children. Its formulation allows for targeted action in the respiratory system, making it a key option during seasonal flu outbreaks and pandemic preparedness.