Budesonide is a medication that belongs to a class of drugs known as corticosteroids. It is commonly used to treat conditions like asthma and chronic obstructive pulmonary disease (COPD) by reducing inflammation in the airways. Budesonide can be administered through inhalers, nebulizers, or as a nasal spray, depending on the condition being treated. In addition to respiratory issues, budesonide is also used to manage inflammatory bowel diseases such as Crohn's disease and ulcerative colitis. By targeting inflammation in the intestines, it helps alleviate symptoms and improve the quality of life for those affected by these conditions.