Budesonide Rotacaps contain budesonide, a corticosteroid medication used to reduce inflammation in the airways. They are primarily used for the maintenance treatment of asthma and chronic obstructive pulmonary disease (COPD). Budesonide helps prevent asthma attacks and COPD exacerbations by decreasing swelling and irritation in the lungs, improving breathing and symptom control when administered via a Rotahaler device.