Budesonide-d6 is deuterium labeled Budesonide. Budesonide, an inhaled glucocortical steroid, is an orally active glucocorticoid receptor agonist. Budesonide decreases the size of lung tumors, reverses DNA hypomethylation and modulates mRNA expression of genes. Budesonide is an anti-inflammatory agent used for asthma[1][2][3][4].