Budirik 400 Capsule is used to treat asthma and chronic obstructive pulmonary disease (COPD). It contains Budesonide and Formoterol, which work by reducing the swelling and relaxing air passages in the lungs, making it easier 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 starting 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.