Budesonide (BUD), sold under the brand name Pulmicort among others, is a medication of the corticosteroid type.

It is available as an inhaler, pill, nasal spray, and rectal forms.

The inhaled form is used in the long-term management of asthma and chronic obstructive pulmonary disease (COPD).

The nasal spray is used for allergic rhinitis and nasal polyps.

The pills in a delayed release form and rectal forms may be used for inflammatory bowel disease including Crohn's disease, ulcerative colitis and microscopic colitis.