Airforu FB 400 DPI Capsule is used to treat asthma symptoms and chronic obstructive pulmonary diseases (COPD). It contains Budesonide and Formoterol, which works by reducing the irritation and swelling by acting inside the nasal passage and airways lining cells and stopping the release of certain chemicals responsible for causing inflammatory reactions and allergies. Thereby, it provides relief from sneezing, runny or blocked nose and sinus discomfort. Also, it relaxes and widens respiratory airway muscles, making it easier for asthma and COPD patients to breathe. Some people may experience side effects such as fungal infection in the mouth, headache, sore throat, hoarse voice, upper respiratory tract infection, flu, cough, back pain, increased heart rate, and trembling. Before taking this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.