Oseltamivir is an antiviral medication used to treat and prevent influenza (flu). It works by stopping the flu virus from spreading inside the body. The medication is converted in the body to its active form called oseltamivir carboxylate. It helps reduce flu symptoms such as fever, cough, and body aches, and may shorten the duration of illness. This medication is particularly important for patients with severe flu infections who require intensive care treatment.

Severe Influenza – A serious form of respiratory infection caused by influenza viruses that affects the airways and lungs. The condition develops more intensely than regular flu, leading to severe breathing difficulties that may require mechanical ventilation support. It is characterized by high fever, extreme fatigue, severe muscle aches, and significant respiratory symptoms including chest pain and shortness of breath. The infection can cause inflammation throughout the respiratory system and may lead to complications affecting lung function. In its severe form, the illness can progress to require intensive care unit management.

Respiratory Failure – A condition where the respiratory system cannot maintain adequate gas exchange, resulting in abnormal levels of oxygen and carbon dioxide in the blood. The condition develops when the lungs cannot properly oxygenate blood or remove carbon dioxide from the body. It often requires mechanical ventilation support through intubation to help maintain proper breathing function. The condition can occur as a complication of severe respiratory infections and other serious illnesses affecting lung function.