Our paper titled “Influence of a Diester Glucocorticoid Spray on the Cortisol Level and the CCR4+ CD4+ Lymphocytes in Dogs with Atopic Dermatitis: Open Study” [1] contains an error in Abstract and Introduction. The concentration of hydrocortisone aceponate spray was incorrectly reported as 0.00584% while the correct value is 0.0584%.